Answer:
Step 2
Step-by-step explanation:
In step 2 the expression was 40+20 which would have been 60 but he might have thought addition sign was subtraction so he did 40-20 which is 20 so he is wrong made mistake in step 2
Answer:
B
Step-by-step explanation:
if you round to the nearest hundredth then that would be rounding the second 9 which rounds to 10 which moves to the tenths place value which moves to the ones place value making the answer 4.
That answer is D because if you add all of the given angles together (90+54) then subtract it from 180 you get 36 which would be the missing angle on the bottom corner and it is the same angle as the other triangle
Answer:
=19
Step-by-step explanation:
What is the how many prime numbers are there from 100-110.
Answer:
Step-by-step explanation:
We want to determine a 95% confidence interval for the population mean for the prices of slice toasters.
Number of sample, n = 12
Mean, u = $61.12
Standard deviation, s = $24.62
For a confidence level of 95%, the corresponding z value is 1.96.
We will apply the formula
Confidence interval
= mean ± z ×standard deviation/√n
It becomes
61.12 ± 1.96 × 24.62/√12
= 61.12 ± 1.96 × 7.107
= 61.12 ± 13.93
The lower end of the confidence interval is 61.12 - 13.93 =47.19
The upper end of the confidence interval is 61.12 + 13.93 = 75.05
