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Sergio039 [100]
3 years ago
9

Help me please asap

Mathematics
1 answer:
enot [183]3 years ago
4 0

Answer:

first one:

Area of a circle = π*r²

diameter (they gave) = 30ft

radius = diameter/2 = 15ft

π*15²= 706.85834705770347865409476123789‬

to nearest tenth= 706.9 ft

second question:

circumference = 2*π*r or d(diameter)*π

diameter = 30ft

30*π = circumference = 94.247779607693797153879301498385‬

in terms of π = 30π

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I bought a television for $435. This is 60% of the original cost. What was the original cost?
Otrada [13]

Answer:

$261

Step-by-step explanation:

Simply multiply 0.6 by 435

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3 years ago
The mass of an empty container is 3/10kg. When the container is half filled with water, the mass becomes 1 1/10kg. What is the m
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Answer:

1.9 kg

Step-by-step explanation:

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3 years ago
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cupoosta [38]

Answer:

16 ft

Step-by-step explanation:

Based on the situation above, it forms into a right triangle. Therefore we can apply the Pythagorean Theorem. We will use the formula below:

c = √( a² + b²)

In the problem above, the ladder acts as the hypotenuse denoted by c. It has a length of 20 ft. While the base denoted by b is 12 ft. Therefore, we need to solve for a. We will derive the formula above.

c² = a² + b²

a² = c² - b²

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Correct me if I'm wrong. I hope it helps.

8 0
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Solve the formula A = one-halfbh for h
garik1379 [7]

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\frac{2A}{b} = h

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2A = bh

Next, we divide both sides by b to get our answer:

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8 0
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son4ous [18]
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Divide 136 by 3 and you will prove that answer is incorrect.
3 0
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