Answer:
Step-by-step explanation:

Pooled proportion

The hypothesis null would be

Alternate can be either not equal to or < or > according to need
Std error for difference of proportions

Hence test statistic = p difference/std error
= 
where p is given as above as combined proportion.
The opposite of 7 on a number line would be -7 because if you look at 0 as a mirror, then the opposite of 7 is -7.
For this problem we can use a proportion to solve.
Set up the proportion.

Cross multiply.

Divide.

So, it would cost $13,200 to have a 1,100 square foot roof installed.
Answer:
It would take you 18 minutes
Step-by-step explanation:
You have 10kil/3min and you also travel 60 kil. 10 to 60 is six times this distance to multiply the time taken to drive by 6. 6 times 3 is 18