Answer:
Step-by-step explanation:
price of shoes= $45
discount= $15
let percentage be x
x=15/45*100
x=0.333333....*100= 33.333...%
20% of 40 is 8
Hope this helps! :D
Answer:
as below
Step-by-step explanation:
= 
2(4x + 17) = 7(6x)
8x +34 = 42x
34 = 42x-8x
34 = 34x
= x
1 =x :)
Answer: <u>56.9</u> years to <u>63.1</u> years.
Step-by-step explanation:
Confidence interval for population mean (when population standard deviation is unknown):

, where
= sample mean, n= sample size, s= sample standard deviation,
= Two tailed t-value for
.
Given: n= 24
degree of freedom = n- 1= 23
= 60 years
s= 7.4 years
Two tailed t-critical value for significance level of
and degree of freedom 23:

A 95% confidence interval on the true mean age:

Hence, a 95% confidence interval on the true mean age. : <u>56.9</u> years to <u>63.1</u> years.