Dave designed a circular pool with a diameter of 24 meters. What is the area of the bottom of the pool round the nearest tenth

Mathematics

1 answer:

kolezko [41]2 years ago

4 0

Answer:

450 m²

Step-by-step explanation:

Area of a circle: $\pi r^{2}$

r is radius and we need to divide the diameter value by 2 to obtain the radius

= 24 / 2 = 12m

Area of a circle = $\pi * 12^{2}$

= 452.57

≈ 450 m²

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The population of Stark county this year is 7,921 people. Last year the population was 7,547 people. Find the approximate percen

Sholpan [36]

Answer:

Option (C)

Step-by-step explanation:

To determine the population we use the formula,

$P_n=P_0(1+r)^{n}$

Where $P_n$ = final population

$P_0$ = Initial population

r = percentage growth

Now we substitute these values in the formula,

$7921=7547(1+r)^1$

$\frac{7921}{7547}=(1+r)$

r = 1.0496 - 1

r = 0.0496

r = 0.05

Therefore, percentage growth of the population of Stark county is 5%.

Option (C). will be the answer.

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3 years ago

You are trying to recreate flubber because you are obsessed with that movie and you thought it was the coolest. you take 70% sli

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Let $x$ be the amount (gal) of the 40% slime solution you end up using. You want to end up with 120 gal of the 50% solution, so that you would use $120-x$ gal of the 70% solution.

You want the final solution to consist of 50% slime, or 60 gal of slime. Each gal of the 40% solution contributes 0.4 gal of slime, while each gal of the 70% solution contributes 0.7 gal of slime. This means

$0.4x+0.7(120-x)=0.5\cdot120=60$