Professional tennis player Novak Djokovic hits the ball extremely hard. His first-serve

speeds follow a normal distribution with

mean 112 miles per hour (mph) and

standard deviation 6 mph. Choose one of

Djokovic's first serves at random. Let Y= its

speed, measured in miles per hour.

a. A first serve with a speed less than 100

miles per hour is considered "slow." What

percent of Djokovic's first serves are slow?

b. Calculate A120 < Y<125) and interpret the

result.

C. Find the 15th percentile of Novak

Djokovic's firstserve speed distribution.

a 360 degree rotation

step-by-step explanation:

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.

step-by-step explanation:

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: