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schepotkina [342]

3 years ago

5

An employee working in a machine shop is exposed to three different sources which emit noises at 81 dB, 91 dB, and 88 dB. What i

s the combined noise level exposure?

1 answer:

leonid [27]3 years ago

5 0

Hello,
Please, see the attached file.
Thanks.

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lisa goes to school for 7 hours per day works 3 hours per day and sleeps 8 hours per day. what is the ratio of hours lisa works

frozen [14]

Answer:

ratio of hours lisa works to hours lisa sleeps= 3:8

Step-by-step explanation:

lisa goes to school for 7 hours per day lisa works 3 hours per day

Lisa sleeps 8 hours per day.

For the ratio of hours lisa works to hours lisa sleeps

ratio of hours lisa works to hours lisa sleeps= hours Lisa works/hours Lisa sleeps

ratio of hours lisa works to hours lisa sleeps= 3/8

ratio of hours lisa works to hours lisa sleeps= 3:8

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2 years ago

Sam has 13 1/2 yards of ribbon. He cuts them 3/4 yards . What is the maximum numbers of pieces of ribbon

german

Answer:

<u>18</u>

Step-by-step explanation:

You basically have to do 13.5 divided by 0.75 (3/4) which equals 18

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2 years ago

Gente quanto é

Aloiza [94]

G) X=4
H) X=2
I) X=-3
J) X=2

8 0

2 years ago

PLEASE SOMEONE HELP I TRULY DO NOT UNDERSTAND

IceJOKER [234]

Hi there!

$\large\boxed{f^{-1}(x) = \sqrt[3]{\frac{x+4}{9} } }$

$f(x) = 9x^{3} - 4$

Find the inverse by replacing f(x) with y and swapping the x and y variables:

$x = 9y^{3} - 4$

Isolate y by adding 4 to both sides:

$x + 4 = 9y^{3}$

Divide both sides by 9:

$\frac{x+4}{9}= y^{3}$

Take the cube root of both sides:

$y = \sqrt[3]{\frac{x+4}{9} }\\\\f^{-1}(x) = \sqrt[3]{\frac{x+4}{9} }$

7 0

3 years ago

Find the area of the trapezoidal prism?

Olenka [21]

Answer: The formula is (b1 + b2)h+PH

Step-by-step explanation:

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2 years ago