Answer:
b 2/7
Step-by-step explanation:
Because there is a 6/21 chance and 2/7=6/21
precision for 40 feet is 1/2 foot
12 cm is 1/2 cm
for 9 1/2 in is 1/4 in
Answer:
She spent $160 total
Step-by-step explanation:
(5 × 20) + (3 × 20) Multiply in the parentheses first
100 + 60 Add
$160 total
If this answer is correct, please make me Brainliest!
Answer:
-4.42
Step-by-step explanation:
Given the following :
Population mean (pm) = 8 hours
Sample mean (sm) = 6.9 hours
Number of observations (n) = 101 students
Sample standard deviation (sd) = 2.5
Using the t-statistic formula :
[(sm - pm) / (sd/√n)]
Hence,
[(6.9 - 8) / (2.5/√101)]
[(-1.1) / (2.5/10.05)]
-1.1 / 0.2487562
= −4.422
The test statistic = - 4.42 to the nearest hundredth.