Answer:
8
Step-by-step explanation:
Answer:
yeah think so? have u done it?
Answer:
7 and 2/3
Step-by-step explanation:
43×234=?
For fraction multiplication, multiply the numerators and then multiply the denominators to get
4×233×4=9212
This fraction can be reduced by dividing both the numerator and denominator by the Greatest Common Factor of 92 and 12 using
GCF(92,12) = 4
92÷412÷4=233
The fraction
233
is the same as
23÷3
Convert to a mixed number using
long division for 23 ÷ 3 = 7R2, so
233=723
Therefore:
43×234=723
Hope this helps! Pls mark brainliest
Answer:
Step-by-step explanation:
We want to determine a 90% confidence interval for the mean amount of time that teens spend online each week.
Number of sample, n = 41
Mean, u = 43.1 hours
Standard deviation, s = 5.91 hours
For a confidence level of 90%, the corresponding z value is 1.645. This is determined from the normal distribution table.
We will apply the formula
Confidence interval
= mean +/- z ×standard deviation/√n
It becomes
43.1 ± 1.645 × 5.91/√41
= 43.1 ± 1.645 × 0.923
= 43.1 ± 1.52
The lower end of the confidence interval is 43.1 - 1.52 =41.58
The upper end of the confidence interval is 43.1 + 1.52 =44.62
Therefore, with 90% confidence interval, the mean amount of time that teens spend online each week is between 41.58 and 44.62