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2 years ago

Find the area of this circle. Area = _______ in2. If the diameter is 8 inches, what willthe radius be? Use 3.14 for pi.

Mathematics

1 answer:

nata0808 [166]2 years ago

8 0

Answer:

50.24

Step-by-step explanation:

diameter is 8 inches

radius is 4

formula:

area = pi times radius squared

area = pi times 4 squared

area = pi times (4 times 4)

area = 3.14 times 16

area = 50.24

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3 years ago

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2 years ago

NASA launches a rocket at t = 0 seconds. Its height, in meters above sea-level, as a function of time is given by h ( t ) = − 4.

Aleks [24]

Answer:

A.) 24.08 seconds

B.) 825.42 metres

Step-by-step explanation:

function of time is given as

h ( t ) = − 4.9 t 2 + 118 t + 115 .

Where a = -4.9, b = 118, c = 115

Let's assume that the trajectory of the rocket is a perfect parabola.

The time t the rocket will reach its maximum height will be at the symmetry of the parabola.

t = -b/2a

Substitute b and a into the formula

t = -118/-2(4.9)

t = 118/9.8

t = 12.041 seconds

Since NASA launches the rocket at t = 0 seconds, the time it will splash down into the ocean will be 2t.

2t = 2 × 12.041 = 24.08 seconds

Therefore, the rocket splashes down after 24.08 seconds.

B.) At maximum height, time t = 12.041s

Substitute t for 12.041 in the function

h ( t ) = − 4.9 t 2 + 118 t + 115

h(t) = -4.9(12.041)^2 + 118(12.041) + 115

h(t) = -4.9(144.98) + 118(12.041) + 115

h(t) = -710.402 + 1420.82 + 115

h(t) = 825.42 metres

Therefore, the rocket get to the peak at 825.42 metres

6 0

3 years ago

The win-loss record for a football team is 15 wins and 9 losses. What percent of their games did they win?

Burka [1]

Answer:

62.5%

Step-by-step explanation:

To find percentage of win, we simply need to find the number of games won and divide it by the total number of games played. Then we will multiply that answer by 100 (to get percentage).

So,

Number of games won = 15

Total number of games = 15 + 9 = 24

Percentage of Win = $\frac{15}{24}=0.625=62.5$

Answer is 62.5%

6 0

3 years ago

Find an equivalent expression to 3(4m-2)-2(m+5)

Anuta_ua [19.1K]

3(4m-2)-2(m+5)

Distribute.

12m-6-2m-10

12m-2m= 10m

-6-10= -16

10m-16

I hope this helps!
~kaikers

3 0

2 years ago