For every 4 yellow t-shirts they manufacture, they should manufacture 7 white t-shirts. the ratio of the number of yellow t-shirts to the number of white t-shirts should be

4:7

Step-by-step explanation:

If the number of yellow T- shirts manufactured = 4

Number of White T- shirts Manufactured= 7

We have to find the ratio of Yellow T- shirts and White - T shirts

Ratio=

Ratio=

Or we can write is as 4:7

Hence, the correct answer is 4:7

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours

question 1: step-by-step explanation:

1/4 of 84 = 84÷4= 21