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rusak2 [61]
3 years ago
14

michelle started practicing the piano at 6:30 pm. He practiced for 2 hours and 17 minutes.Hat time did he finish practicing the

piano
Mathematics
1 answer:
ale4655 [162]3 years ago
3 0

Answer:

8:47

Step-by-step explanation:

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The annual rate of deprication,x, on a car that
goblinko [34]
Idk sorry I’ll look it up soon tho Maybe
6 0
3 years ago
Write an equation for the line that passes through the given points <br> (-3,0) (-2,3)
Ganezh [65]

Answer:

y-3x-9=0

Step-by-step explanation:

(x1,y1)=(-3,0)and (x2,y2)=(-2,3)

Now,

y-y1=(y2-y1)/(x2-x1) (x-x1)

y-0=3-0/-2-(-3) (x-(-3))

y-0=3/1 (x+3)

y=3x+9

y-3x-9=0

8 0
3 years ago
It is 4:12 p.m. Emma's mom will be home from work in 70 minutes, and Emma has gymnastics lessons at 6:00 p.m.
egoroff_w [7]

Answer:

emma is dum as freak

Step-by-step explanation:

.................................................

8 0
3 years ago
Find the area of the shaded regions. Give your answer as a completely simplified exact value in terms of π (no approximations).
Lapatulllka [165]
Hello!

The formula for the area of a sector can be written as follows:

Area = \frac{1}{2}r^{2}(R)

In the above formula, “r” represents the radius while “R” represents the radian measure of a sector. The radius is given to us in the image above as 10 inches. However, we still need the radian measure of the two sectors. To find this measure, we can use the following conversion:

1 degree = \frac{pi}{180} radians

Because the two sectors have a given measure of 72 degrees, we need to multiply both sides of the above conversion by 72:

72 degrees = \frac{72pi}{180}

Reduce the fraction on the right side of the equation:

72 degrees = \frac{2pi}{5}

We now have the radian measure of both sectors. Now simply insert this and any other known values into the “area of a sector” formula above:

Area = \frac{1}{2}10^{2}(\frac{2pi}{5})

Simplify the right side of the equation to get the following answer:

Area = 20 pi

We have now proven that the area of one sector is equal to 20 pi.

If, however, you need the combined area of the two identical sectors, simply multiply the proven area by 2 to get a total area of 40 pi.

I hope this helps!


3 0
3 years ago
The probability is 51​% that the sample mean will be between what two​ values, symmetrically distributed around the population​
Alisiya [41]

Answer:

The lower bound is, -z=-0.69 and the upper bound is z=0.69.

Step-by-step explanation:

Let the random variable <em>X</em> follows a normal distribution with mean <em>μ </em>and standard deviation <em>σ</em>.

The the random variable <em>Z, </em>defined as Z=\frac{X-\mu}{\sigma} is standardized random variable also known as a standard normal random variable. The random variable  Z\sim N(0, 1).

The standard normal random variable has a symmetric distribution.

It is provided that P(-z\leq Z\leq z)=0.51.

Determine the upper and lower bound as follows:

P(-z\leq Z\leq z)=0.51\\P(Z\leq z)-P(Z\leq -z)=0.51\\P(Z\leq z)-[1-P(Z\leq z)]=0.51\\2P(Z\leq z)-1=0.51\\2P(Z\leq z)=1.51\\P(Z\leq z)=0.755

Use a standard normal table to determine the value of <em>z.</em>

The value of <em>z</em> such that P (Z ≤ z) = 0.755 is 0.69.

The lower bound is, -z=-0.69 and the upper bound is z=0.69.

5 0
4 years ago
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