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2 years ago

Michael paints a circular

Mathematics

1 answer:

BigorU [14]2 years ago

6 0

Answer:

90.25π

Step-by-step explanation:

The formula for solving the area of a circle is πr².

r is the radius. We can find the radius by splitting the diameter in half: 19/2 = 9.5.

We can apply the area formula and we get π9.5² and the answer is 90.25π.

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The population of a school is 800 students and is increasing at a rate of 2% per year. Use an exponential function to find the p

Mazyrski [523]

Answer:

144 students in 9 years

Step-by-step explanation:

2%=0.02. 800×0.02=16

16×9=144

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3 years ago

5. Show and prove why (xyz)to the power of 4=x to the power of 4 +y to the power of 4+z to the power of 4

Mkey [24]

Answer:

Step-by-step explanation:

i dobt even know

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3 years ago

How many inches are in 5 feet

nata0808 [166]

Since 1 foot equals to 12 inches, it can be written as 1/12. We just have to multiply both the numerator and denominator by 5. If we do this, then the answer will be 5/60. So, in five feet, there are 60 inches.

Hope it helps :)

8 0

3 years ago

Read 2 more answers

PLEASE HELP WILL MARK BRAINLIEST

riadik2000 [5.3K]

Answer:

a) 7,10,13,16, 34

b) -1,3,7,11, 35

3 0

3 years ago

Read 2 more answers

CHECK ALL ANSWERS THAT APPLY*

Musya8 [376]

Answer:

We get t= 7.22 and t=0.28

The correct options are Option A and Option G

Step-by-step explanation:

The height h of toy rocket at time t seconds after launch is given by the equation $h(t) = -16t^2 + 120t + 8$

We need to find how many seconds until the rocket is 40 feet?

We are given height of rocket h(t) = 40 feet

and we need to find time t

Using the equation $h(t) = -16t^2 + 120t + 8$ we can find time t

We have h(t)=40

$h(t) = -16t^2 + 120t + 8\\Put\:h(t)=40\\40= -16t^2 + 120t + 8\\16t^2-120t-8+40=0\\16t^2-120t+32=0$

Now, we will solve the quadratic equation using quadratic formula: $t=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

We have a =16, b=-120 and c=32

Putting values and finding t

$t=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\t=\frac{-(-120)\pm\sqrt{(-120)^2-4(16)(32)}}{2(16)}\\t=\frac{120\pm\sqrt{14400-2048}}{32}\\t=\frac{120\pm\sqrt{12352}}{32}\\t=\frac{120\pm111.12}{32}\\t=\frac{120+111.12}{32}, t=\frac{120-111.12}{32}\\t=7.22\:,\:t=0.28$

So, we get t= 7.22 and t=0.28

The correct options are Option A and Option G

4 0

3 years ago