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3 years ago

A craftsman drill is on sale for $99.99. If the sales tax rate is 7% how much will molley have to pay for the drill

Mathematics

1 answer:

atroni [7]3 years ago

5 0

106.99 dollars is what it is rounded to

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Find (f•f) (0) F(x)=3x-2

NNADVOKAT [17]

Answer: (f·f)(0) = 4

(fof)(0) = -8

Step-by-step explanation:

f(x) = 3x - 2

(f·f)(x) = (3x - 2)(3x - 2)

= 9x² - 12x + 4

(f·f)(0) = 9(0)² - 12(0) + 4

= 4

(fof) = 3(3x - 2) - 2

= 9x - 8

(fof)(0) = 9(0) - 8

= -8

I wasn't sure if you wanted multiplication or composition so I solved both

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3 years ago

If a necklace is $250, and it's 125% of the original price, what's the original price?

Dima020 [189]

The original price would have been $312.5

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3 years ago

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I need to know how to find the mass and how to get the answer by showing the work.

BigorU [14]

1 ft = 12 in
6 in = 6/12 = 0.5 ft
9 in = 9/12 = 0.75 ft

D = M/V ⇒ M = DV

V = 0.5 * 0.5 * 0.75 = 0.1875 cubic foot
M = 41.7 * 0.1875 ≈ 7.8 pounds

Answer: B.

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2 years ago

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What is the ratio for cos B

nataly862011 [7]

Answer:

cos B = 8/17

Step-by-step explanation:

The cosine function is defined as (adjacent side) / (hypotenuse), and in this case is 8/17.

6 0

3 years ago

An article in Medicine and Science in Sports and Exercise "Maximal Leg-Strength Training Improves Cycling Economy in Previously

Hatshy [7]

Answer:

The 99% confidence interval for the mean peak power after training is [299.4, 330.6]

$299.4\leq\mu\leq 330.6$

Step-by-step explanation:

We have to construct a 99% confidence interval for the mean.

A sample of n=7 males is taken. We know the sample mean = 315 watts and the sample standard deviation = 16 watts.

For a 99% confidence interval, the value of z is z=2.58.

We can calculate the confidence interval as:

$M-z\sigma/\sqrt{n}\leq\mu\leq M+z\sigma/\sqrt{n}\\\\315-2.58*16/\sqrt{7}\leq\mu\leq 315+2.58*16/\sqrt{7}\\\\315-15.6\leq \mu\leq 315+15.6\\\\299.4\leq\mu\leq 330.6$

The 99% confidence interval for the mean peak power after training is [299.4, 330.6]

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3 years ago