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DiKsa [7]
3 years ago
11

How do you do this page

Mathematics
1 answer:
andrew11 [14]3 years ago
8 0
13. Is 12 and 22. Is 11
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Hiya! Can you guys help me? For all the four questions? It would mean a lot to me, thank you! I also ask if you guys can explain
Bess [88]

Answer:

A = 28.26 cm², P = 38 units, A = 20 units², C = 43.96 units

Step-by-step explanation:

1) Our area of a circle is πr². Since our r = 3 cm, we can just substitute for r.

A = πr²

A = (3.14)(3)²

A = (3.14)(9)

A = 28.26 cm², like in your work.

2) Our formula for perimeter is 2l + 2w. We substitute for l = 12 and w = 7.

P = 2l + 2w

P = 2(12) + 2(7)

P = 24 + 14

P = 38 units

3) The formula for a triangle's area is A = \frac{1}{2}bh, so we substitute for b = 10 and h = 4.

A =  \frac{1}{2} bh

A =  \frac{1}{2} (10)(4)

A =  \frac{1}{2} (40)

A = 20 units²

4) Circumference is 2πr, and we substitute for r = 7.

C = 2πr

C = 2(3.14)(7)

C = (3.14)(14)

C = 43.96 units

6 0
2 years ago
After hip surgery, your doctor tells you to walk 5 minutes a day. Each day thereafter, you should increase your walk time by 2 m
tatuchka [14]
7 mins a day hope this helps 
4 0
3 years ago
A blueprint for a house shows the height of the house to be 3 3/8 inches. The actual house is 21 1/3 feet tall. What is the unit
Amanda [17]
6.32ft per inch (rounded to the hundredth place).

You can get this number by dividing the total number of feet by the total number of inches 
6 0
3 years ago
Add. Write your answer in simplest form.
alexandr1967 [171]

Answer:

yes, you got it correct

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
What do you do if the divisor (the number you're dividing
Annette [7]

Answer:

you can use decimals

Step-by-step explanation:

7 0
3 years ago
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