ANSWER THESE TWO QUESTIONS FOR ME:
1. If the surface area of a cube is 390 cm², then which best describes the length of the side of the cube?
A. less than 7 cm
B. between 7 cm and 8 cm
C. between 8 cm and 9 cm
D. greater than 9 cm
2. The net below shows equilateral triangles. What is the total surface area of the triangular pyramid in square feet?
Answers
Answer:
65^2
Step-by-step explanation:
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#1:
Between 8 cm and 9 cm
Work:
SA = 6s^2
390 = 6 s^2
390/6 = 6s^2 /6
65 = s^2
sqrt(65) = s
s = 8.06
#2:
The total surface area of the triangular pyramid is 107 * square feet.
What is a triangular pyramid?
Take a triangle. This is a base. Now take 3 triangles such that each of them are connected to one-one side of the first triangle and when they're taken together, they form a closed object, called as a triangular pyramid.
We are given that;
The length of median from outer triangle to side of the inner triangle is 8 ft
Side of inner equilateral triangle is 12 ft
Now,
First, we can find the height of the outer equilateral triangle using the Pythagorean theorem:
a is half the length of the side of the inner triangle (6 ft), m is the length of the median (8 ft), and b is the length of the side of the outer triangle (unknown).
a^2 + (m/2)^2 = b^2
b^2 = 6^2 + 8^2/4
b^2 = 36 + 4
b^2 = 40
b = sqrt(40)
b = 2 * sqrt(10)
So the height of the outer triangle is:
h = b * sqrt(3)/2
h = sqrt(30)
Now we can find the area of each equilateral triangle using the formula:
A = (sqrt(3)/4) * s^2
For the inner triangle:
A_inner = (sqrt(3)/4) * 12^2
A_inner = 36 * sqrt(3)
For the outer triangle:
Now we can find the area of the base, which is just the area of the inner equilateral triangle:
A_base = A_inner
A_base = 36 *
Finally, we can find the surface area of the triangular pyramid by adding the areas of the four triangles and the base:
SA = A_inner + 3 * A_outer + A_base
Related Questions
PLZ HELP ME ON THIS THANK YOU SO MUCH!
Answers
Answer:
9.2!!!
Step-by-step explanation:
Please help
two cities are 120 miles from each other how far apart would the cities be on a map that has a scale of 0.6 inches 7.5 miles
Answers
Answer:
9.6
Step-by-step explanation:
so 120 divided by 7.5=16
16x0.6= 9.6 inches
Answer:
9.6 inches
Step-by-step explanation:
divide 120 by 7.5=16
So, 16x0.6= 9.6 inches
mark me brainlst!
help will mark brainiest
Answers
Answer:
10 ounces of water each hour
Step-by-step explanation:
so you multiply 21/2 times 4 then it gives you the answer 10
When he receives his first memory from the old man, what did Jonas experience for the first time?
A. the colors of the rainbow
B. the painful feeling of a sunburn
C. the feeling of snow and of riding a sled down a hill
D. the feeling of driving a car on an open road
Answers
Answer:
C. The feeling of snow and of riding a sled down a hill.
Step-by-step explanation
I read the book.
In the parking lot of Super Grocers, the parking spaces are shaped like parallelograms. Each parking space has a base of 16 feet and a height of 8 feet. What is the area of each parking space?
A. 128 square feet
B. 64 square feet
C. 48 square feet
D. 24 square feet
Answers
Answer:
128 square feet
Step-by-step explanation:
Drug Name Half-life
-----------------------------------
Acetaminophen 1-4 hours
Ibuprofen 1.8-2 hours
Loratadine 8.4 hours
Lithium 8 hours
Diphenhydramine 5.3-11.7 hours
The table above displays the half-lives of 5 common house hold drugs. The half-life (h) is the time is takes for a substance to reduce to half its initial value (A0). Half life can be used to solve for the amount (A) of a substance left after t time by using the following equation:
A=A^0⋅(12)^t/h
If Scott was administered 300 mg of Lithium, which of the following represents how much lithium, rounded to the nearest hundredth of a mg, could be left in Scott's blood stream after 12 hours?
Select one:
A. 157.23
B. 106.07
C. 212.17
D. 188.99
Answers
Answer:
B. 106.07
Step-by-step explanation:
To make use of the given formula for amount remaining, we need to know the original amount (300 mg), the elapsed time (12 h), and the half-life of the substance of interest (8 h).
SetupUsing the given formula with the relevant values, we have ...
A = (300 mg)·(1/2)^(12/8)
EvaluationUsing a calculator to evaluate this expression, we find the amount of Lithium remaining in Scott's system after 12 hours to be ...
A ≈ 106.07 mg
The Help All Animals Society is having a fundraiser at a local auditorium. They charge $5.00 a ticket to attend the event. If the rental fee for the auditorium is $100, which expression represents the profit if n tickets are sold?
A.5n-100
B.5n+100
C.100-5n
D.100 divided by 5n
Answers
The expression represents the profit if n tickets are sold is 100-5n, the correct option is A.
What is Algebra?Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.
The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.
Given;
They charge $5.00 a ticket to attend the event.
The rental fee for the auditorium is $100
Now,
5*n is the charge collected
100 is the rent
=5n-100
Therefore, by algebra profit will be 5n-100.
More about the Algebra link is given below.
brainly.com/question/953809
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someone please help, this is due soon. :(
Answers
Answer:
Step-by-step explanation:
Total Length = Desks x 1.3
Hope that helps!
Answer:
<3<3<3<3<3<3<3<3<3<3<3<3<3<3
Total Length = Desks x 1.3
<3<3<3<3<3<3<3<3<3<3<3<3<3<3
Find the distance between -8 and 10. What is an expression that represents the distance? Complete the expression
Answers
Answer:
10-(-8)
Step-by-step explanation:
10-(-8)=18
Answer:10-8=2
Step-by-step explanation: it is asking for another equation you can use to find -8 and 10. First you count the numbers on the number line, it is counting by 2’s, go to -8 and count by 2’s until you reach 10. they are opposite signs meaning you subtract, you should get 2. then you write an equation that gets you positive 2.
can someone please help me graph this and write an equation for it.
Answers
And now I need 20 characters so I am writing this
If you were solving for y what would the first step? -5=y-7/9
Answers
Answer:
-38/9
Step-by-step explanation:
-5=x-7/9
-5+(7/9)=x-(7/9)+(7/9)
x=-5+(-7/9)
x=(-38/9)
some help please? I'll give brainliest :(
Answers
Answer:
it would be P/n =1.25
Step-by-step explanation:
Answer:
1.25
Step-by-step explanation:
hope this helps
Will is packing cubes with side lengths that are
1
4
foot long into a box, which is
3
1
2
feet long,
2
1
2
feet wide, and
1
1
2
feet tall.
How many of the cubes will fit into the box?
Answers
Answer:
54
Step-by-step explanation:4545
Step-by-step explanation:
90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you
A simple interest loan of
$4,000 was repaid at the end
of 3 years with a check for
$4,972. What annual rate of
interest was charged?
Answers
I would like you to picture a basketball court. There is a basket on each end of the court. They are congruent by definition. Describe the transformation that would copy one basket onto the other.
Pls I rlly need help!
Answers
Answer:
Depends on how you want it.
Step-by-step explanation:
congruent means they are similar, i guess. a transformation is where something moves in a singular direction. i hope this helps you figure it out!
Answer:
they would look like brothers but are on different teams, but look like the baskets, and a same ball would go through the same baskets that are brothers.
Step-by-step explanation:
BROTHERERERERERERRERER
Can y’all help me again
Answers
Answer:
2. Given the points A, B, C, D, calculate:
(a) the angle B of the triangle ABC
(b) the area of the triangle ABC
(c) the median BE of the triangle ABC
(d) the height AH of the triangle ABC
(e) the volume of tetrahedron ABCD
(f) the point E so that ABCE is a parallelogram.
A(-1, 2, -3), B(4, -1, 0), C(2, 1, -2), D( 3,4,5)
Step-by-step explanation:
Why is 90 the sum of all factors of 40, including 40? The factors of the number 40 are: 1, 2, 4, 5, 8, 10, 20, 40. If you add them up, you will get the total of 90.
Select all that apply.
To decide if 12.5 centimeters is greater than 140 millimeters, the first step is to set up a proportion Which of the following proportions are correct?
12.5 cm/1 cm = 140mm/x
10mm/1 cm = 140mm/x
1 cm/10 mm = 12.5 cm/x
10 mm/1 cm= x/140 mm
Answers
Answer:
c
Step-by-step explanation:
If we need to convert 12.25cm to mm we know
that 1cm =10mm so we need to find out how many
mm are in 12.25cm and let 12.5 cm =x
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Answer:
C is your answer
Step-by-step explanation:
Sorry if i'm wrong
When given a system of equations in slope-intercept form, is graphing or substitution the most efficient method to solve? Explain.
Choose the best answer below.
A.
Substitution is the only method that should be used if the answer involves integer values. If the answer involves values that are not integers, graphing would be more efficient because an exact answer can be obtained. It is easier to read graphs when the point of intersection does not occur at integer values.
B.
Graphing is the only method that would be appropriate to use here because it is not possible to use the substitution method if both equations are in slope-intercept form.
C.
Substitution is the only method that would be appropriate to use here because it is not possible to use the graphing method if both equations are in slope-intercept form.
D.
Graphing and substitution are appropriate to use if the answer involves integer values. If the answer involves values that are not integers, substitution would be more efficient because an exact answer can be obtained. It can be difficult to read graphs if the intersection point does not have integer values so this would be an inefficient method to solve with.
PLEASE HELPPPPP
Answers
A system of equations in slope-intercept form can be solved by,
D. Graphing and substitution are appropriate to use if the answer involves integer values. If the answer involves values that are not integers, the substitution would be more efficient because an exact answer can be obtained. It can be difficult to read graphs if the intersection point does not have integer values so this would be an inefficient method to solve with.
What are lines and their slopes?We know lines have various types of equations, the general type is
Ax + By + c = 0, and the equation of a line in slope-intercept form is
y = mx + b.
Where slope = m and b = y-intercept.
the slope is the rate of change of the y-axis with respect to the x-axis and the y-intercept is the (0,b) where the line intersects the y-axis at x = 0.
Given, a system of equations in slope-intercept form y₁ = m₁x₁ + b₁ and
y₂ = m₂x₂ + b₂.
We can use both substitution and graphing depending on the numerical values of the variables.
If the solution involves integer numbers, graphing and substitution are the proper methods to utilize. Substitution would be more effective since an accurate solution may be reached if the solution involves values that are not integers. If the intersection point doesn't have integer values, it can be challenging to understand graphs, so using this approach to solve would be ineffective.
learn more about lines and slopes here :
https://brainly.com/question/3605446
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explain how to read a tally chart
Answers
Answer:
one vertical line is made for the first four numbers and the fifth number is represented by a diagonal line across the other four lines .
Step-by-step explanation:
For the number 5, draw four vertical lines (||||) with a diagonal (\) line through it.
l = 1
ll = 2
lll = 3
llll = 4
卌 = 5
pls helpppp :)
Solve each inequality by showing work (inverse operations on both sides) OR explaining. Make sure you give the full solution as an inequality.
1. 4x < -20
2. -8 ≥ -2 + x
3. 2x + 4 ≤ 10
Answers
Answer:
.
Step-by-step explanation:
....................
Help.me out is the answer 40 if not help and don't answer saying you don't know don't wast my points.
Answers
Answer: I think it’s 150
Step-by-step explanation:
Answer:
I believe that it is 30
Step-by-step explanation:
Tell me if im correct :)
Help! Will give brainliest to the best answer, questions in picture!
Answers
Answer:
X x 2 ÷ 17
Step-by-step explanation:
X is always considered as our variable.
Using the key words quotient and twice and the word "and" can help you.
Help. The graph of y=(x-h)^2+k is a ___ of the graph y=x^2 through the translation of ___. What goes in the blanks?
Answers
Help! Im being timed!
Answers
Answer:90
Step-by-step explanation; 18 + 18+24
Solve the system of equations by multiplying first. Enter the solution as an ordered pair.
x + 3y=−2
3x + 7y=−2
HELPPP I NEED THESE RNNN
The solution is _____ .
Answers
Edelia is planning a crawfish broil party. Each case of crawfish weighs 20 pounds of crawfish. If each pound of crawfish contains 15-25 individual crawfish, approximately how many crawfish can she serve if she buys 5 cases?
Answers
Edelia can serve approximately 1,500 to 2,500 crawfish if she buys 5 cases.
Given:
Each case of crawfish weighs 20 pounds.Each pound of crawfish contains 15-25 individual crawfish.Edelia buys 5 cases.The theory of unit conversion and basic arithmetic is used to solve this question.
1. Finding the total weight of crawfish.
Total weight of crawfish = Weight per case × Number of cases
Total weight of crawfish = 20 pounds × 5 cases
Total weight of crawfish = 100 pounds.
2. Determining the range of crawfish count.
Since each pound of crawfish contains 15-25 crawfish, we can calculate the minimum and maximum number of crawfish as follows:
Minimum crawfish count = Minimum crawfish per pound × Total weight of crawfish
Minimum crawfish count = 15 crawfish/pound × 100 pounds
Minimum crawfish count = 1500 crawfish.
Maximum crawfish count = Maximum crawfish per pound × Total weight of crawfish
Maximum crawfish count = 25 crawfish/pound × 100 pounds
Maximum crawfish count = 2500 crawfish.
Therefore, Edelia can serve approximately 1,500 to 2,500 crawfish if she buys 5 cases of crawfish.
Learn more about unit conversion at
https://brainly.com/question/141163
can someone please help me find the rate of change in this function?
(11.0, 11.0)
The answer is not zero
Answers
Answer:
If the answer isn't 0 or .0 I'm going to need some answer choices.
Step-by-step explanation:
-10=5 - 3s
Can you help me
Answers
Answer:
s=5
Step-by-step explanation:
-10=5-3s
+3s on both sides
-10+3s=5
+10 on both sides
3s=15
divide by three on both sides
s=5
Hope this helps =]
Answer:
-10 = 2
This is the answer to your equation if you're wondering I didn't know what else to do but to evaluate it for you.
Deandre has a bookcase with k shelves. There are 13 books on each shelf. Using k , write an expression for the total number of books.
Answers
Answer:
13k
or
13 x k
Step-by-step explanation:
Or
13k
Or
13(k)
Evaluate the expression for the given value of x
0.3x + 66 for x=-2
Answers
Answer:
66.6
Step-by-step explanation:
Because 0.3 x 2 = 0.6 and 2 + 66 = 66.6
So yea
