jacks car used 18 gallons of gasoline to go 468 miles. At that rate, how many gallons would be used to go 754 miles? Explain you
2 answers:
Answer:
29 gallons
Step-by-step explanation:
Jacks car used 18 gallons of gasoline to go 468 miles.
we have to calculate the amount of gasoline would be used to go 754 miles.
∵ 18 gallons of gasoline were used to travel = 468 miles
∴ 1 gallon of gasoline were used to travel =
= 26 miles
∴ to cover the distance of 754 miles gasoline would be used =
= 29 gallons of gasoline
29 gallons of gasoline would be used to go 754 miles.
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Answer:
The proportion of students whose height are lower than Darnell's height is 71.57%
Step-by-step explanation:
The complete question is:
A set of middle school student heights are normally distributed with a mean of 150 centimeters and a standard deviation of 20 centimeters. Darnel is a middle school student with a height of 161.4cm.
What proportion of proportion of students height are lower than Darnell's height.
Answer:
We first calculate the z-score corresponding to Darnell's height using:
We substitute x=161.4 , , and
to get:
From the normal distribution table, we read 0.5 under 7.
The corresponding area is 0.7157
Therefore the proportion of students whose height are lower than Darnell's height is 71.57%