Answer:
Percent increase = 30%
Step-by-step explanation:
Given that:
Old price of toy = £50
New price of toy = £65
Difference = New price - Old price
Difference = 65 - 50
Difference = £15
Percent increase =
Percent increase =
Percent increase = 0.3 * 100
Percent increase = 30%
Hence,
Percent increase = 30%
Answer:
the standard deviation of the speeds of cars travelling on California freeways is 6.0 miles per hour
Step-by-step explanation:
The computation of the standard deviation of the speeds of cars is shown below;
The z score for the top 1% is 2.326
So,
= (75 - 61) ÷ standard deviation = 2.326
Standard deviation is
= 14 ÷ 2.326
= 6.0 miles per hour
Hence, the standard deviation of the speeds of cars travelling on California freeways is 6.0 miles per hour
