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3 years ago

Find the area of a circle with a diameter of 14 meters. Round your answer to the nearest hundredth of a square meter. *

Mathematics

1 answer:

erica [24]3 years ago

3 0

Answer:

The area of the circle is 153.94m²

Step-by-step explanation:

radius = half of diameter

d = diameter

r = 14m / 2 = 7m

To solve this problem we need to use the area formula of a circle:

a = area

r = radius = 7m

π = pi

a = π * r²

we replace with the known values

a = π * (7m)²

a = π * 49m²

a = 153.93804 m²

Round to the nearest hundredth

a = 153.93804m² = 153.94m²

The area of the circle is 153.94m²

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Find the value of x so that (x,-4) is on the line given by -2x + 3y = 6.

lord [1]

Answer:

Step-by-step explanation:

-2x + 3y = 6.....(x, -4)...so y = -4

-2x + 3(-4) = 6

-2x - 12 = 6

-2x = 6 + 12

-2x = 18

x = -18/2

x = -9

so the value of x is -9.....(-9,-4)

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3 years ago

skate land charges a $50 fee for a birthday party rental and $4 for each person. Joann has no more than $100 to budget for her p

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Answer:

11 then Joann would have $2 left over.

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3 years ago

Convert 0.0045 from standard form to scientific notation.

djyliett [7]

I did not catch well, but i think you already got your answers. Let me explain. For the first part you got your notation right: for 0.0045 the correct scientific notation is 4.5 x 10^-3. Now the second part, the answer would be the first one, the notation that you are giving is the one who corresponds to <span>4.5 x 10^-2, the first option you have. Hope it helps</span>

3 0

3 years ago

Read 2 more answers

You wonder how many cars there are in your area. You call up the Ford dealership and ask how many Fords they’ve sold. They repor

SVETLANKA909090 [29]

If we take 1200 as the 100%, how much percentage is 700 of it?

well $\bf \begin{array}{ccllll}
amount&\%\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
1200&100\\
700&x
\end{array}\implies \cfrac{1200}{700}=\cfrac{100}{x}\implies x=\cfrac{700\cdot 100}{1200}
\\\\\\
x=\cfrac{175}{3}$

so, (175/3)% or roughly 58.3%

now, how much is (175/3)% of 15000 ?
well, if we take 15000 as the 100%
then $\bf \begin{array}{ccllll}
amount&\%\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
15000&100\\
x&\frac{175}{3}
\end{array}\implies \cfrac{15000}{x}=\cfrac{100}{\frac{175}{3}}
\\\\\\
\cfrac{15000\cdot \frac{175}{3}}{100}=x\implies \cfrac{5000\cdot 175}{100}=x$

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3 years ago

Jane took 15 min to drive her boat upstream to water-ski at her favorite spot. Coming back later in the day, at the same boat

s344n2d4d5 [400]

Answer:

The speed of the boat in still water = 8 Km/hr

Step-by-step explanation:

Let the speed of the boat be x

According to question

(x-4)15 = (x+4)5

3x-12 = x+4

⇒x = 8 km/hr

7 0

2 years ago