It takes avery 3/4 hour to paint 1/5 of a painting. at this rate, how long will it take her to complete the painting?

It will take Avery 3 hours and 45 minutes to complete the painting.

Step-by-step explanation:

Time that it takes Avery to paint 1/5 of a painting = 3/4 hour

How long will it take her to complete the painting?

Time that it takes Avery to paint 1/5 of a painting = 3/4 * 60

Time that it takes Avery to paint 1/5 of a painting = 45 minutes

Time that it takes Avery to complete the painting = 45 minutes * 5

Time that it takes Avery to complete the painting = 225 minutes

Time that it takes Avery to complete the painting = 225/60

Time that it takes Avery to complete the painting = 3 hours and 45 minutes

It will take Avery 3 hours and 45 minutes to complete the painting.

It will take 3.45 hours to complete a painting

Explanation:

Given

It takes every ¾ hour to paint 1/5 of a painting

Let us consider complete painting to be 1

According to the principle of unitary method,

1/5 of painting = ¾ hour

Complete painting =  

=  (3/4)*5 = 15/4 hours

15/4 hours = 3.75

Hence, it will take 3.45 hours to complete a painting

4.

step-by-step explanation:

it have the same area.brainliest

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.