All categories

1 year ago

Please Help!!!!!!!!!!

Mathematics

2 answers:

alexdok [17]1 year ago

7 0

Answer: B

Step-by-step explanation:

(I tried)

The formula for the area of a circle is A (area) = π (3.14) x R (radius) ^2 (second power)

Since the word problem gave the diameter, you can divide that by 2 to give you 9, aka the radius. (Radius + Radius = Diameter, diameter divided by 2 gives you radius)

Looking back at the formula, R^2 (it always comes first), 9^2 (9x9) equals 81 and then multiplying pi (3.14) to get your answer of 254.34 in.

Butoxors [25]1 year ago

5 0

Answer:

B. 254.34 in2

Step-by-step explanation:

You might be interested in

Describe how the graph of the second function relates to the graph of the first function. y = |x| y = |x| − 3

tresset_1 [31]

Step-by-step explanation:

y=|x| is a vee graph starting at (0,0)

y=|x| - 3 is a vee graph starting (0,-3)

see attachment

3 0

2 years ago

Select all the correct answers.

geniusboy [140]

Rectangular Prism Volume = length × width × height

So 4 of those could make the prism:
2 units, 3 units, 6 units
36 units, 1 unit, 1 unit
9 units, 2 units, 2 units
12 units, 3 units, 1 unit

7 0

2 years ago

Read 2 more answers

The number shown above belongs to which of the following subsets of the real numbers?

Nookie1986 [14]

Answer:

Rational

Step-by-step explanation:

the rational number subset contains fractions

3 0

3 years ago

Read 2 more answers

Jason runs 440 yards in 75 seconds.at this rate,how many minutes does it take him to run a mile

Kazeer [188]

Answer:

5 minutes

Step-by-step explanation:

Do a proportion

440/75= 1760/x

cross multiply

440x=1760(75)

simplify

132000/440

4 0

3 years ago

4 The ratio of corresponding dimensions of two similar solids is 3/4. The surface

White raven [17]

4.

The ratio is 3/4 for corresponding dimensions, the ratio of their surface areas is equal to the square of this ratio:

$\sf (\dfrac{3}{4})^2=\dfrac{S}{96}$

Simplify the exponent:

$\sf \dfrac{9}{16}=\dfrac{96}{S}$

Cross multiply:

$\sf 9S=1536$

Divide 9 to both sides:

$\sf S\approx 170.7~m^2$

So the surface area of the second solid is 54 square meters.

The ratio is 3/4 for corresponding dimensions, the ratio of their volumes is equal to the cube of this ratio:

$\sf (\dfrac{3}{4})^3=\dfrac{720}{V}$

Simplify the exponent:

$\sf \dfrac{27}{64}=\dfrac{720}{V}$

Cross multiply:

$\sf 27V=46080$

Divide 64 to both sides:

$\sf V\approx 1706.7~m^3$

5.

A globe is a sphere, use the formula for the volume of a sphere:

$\sf V=\dfrac{4}{3}\pi r^3$

The radius is half of the diameter, so the radius here is 40/2 = 20. Plug it in the formula, use 3.14 to approximate for Pi:

$\sf V=\dfrac{4}{3}(3.14)(20)^3$

Simplify the exponent:

$\sf V=\dfrac{4}{3}(3.14)(8000)$

Multiply:

$\sf V\approx \boxed{\sf 33,493~in^3}$

6 0

3 years ago

Read 2 more answers