Julian puts 3.5 gallons of gasoline in his tank.if this is 14% of the total volume of his tank how many gallons of gasoline can his tank hold?
a. 25
b.36
c. 41
d.49

3.5 gallons = 14% of Total volume

Let the total volume be = x.

3.5 = (14/100)*x

3.5 = 14x / 100

3.5 * 100 = 14x

14x = 100 * 3.5

x = 100 * 3.5 / 14        Use a calculator

x  = 25

The tank can hold total volume of 25 gallons.

A.

(24.6 , 25.2)

Step-by-step explanation:

Formula to find the confidence interval for population mean () is given by :-

, where = Sample mean

z* = Critical z-value. (By z-table)

= Population standard deviation.

n= Sample size.

As per given , we have

n= 837

The critical value for 90% confidence interval : z* = 1.645 (By z-table)

The confidence interval for the mean number of words a third grader can read per minute will be :

∴  The confidence interval for the mean number of words a third grader can read per minute= (24.6 , 25.2)