Answer:48.6
we know that
You can paint 75 square feet of a surface every 45 minutes
so
using proportion
Find out how long it takes you to paint a surface area of 81 square feet
45(81)/75=48.6
hope this helped and I hope you get a correct answer :D
Answer:
<em>Fraction form=31/8 Decimal form=3.875 </em>
Step-by-step explanation:
<em>Convert the mixed numbers to improper fractions, then find the Least common denominator and combine</em>
Answer:
120 into a third and divide and the answer
Step-by-step explanation:
160
5 = 50
8 = 80
because:
20:2= 10 so 1 shirt will collect 10
Answer: Sample statistics are used to make inferences about population parameters.
Step-by-step explanation:
A number which describes a population is called a parameter, such as a proportion or percentage.
A statistic is a number which may be calculated from the data observed in a random sample without demanding the use of any unknown parameters.
The mean and variance of a population are population parameters.
Thus, fourth statement is the right answer "Sample statistics are used to make inferences about population parameters."
