The answer is 4.
Here's how to solve it.
Remove parentheses:
=20 × 7/35
7/35 = 1/5
Cancel the common factor 7:
=1/5
=20 × 1/5
Multiply fractions:
1·20/5
Simplify:
20/5
Divide
20/5=4
Hope this helped! :)
Answer:
B
Step-by-step explanation:
(6)^1/2 × (8)^1/2
6^1/2 × 2 (2)^1/2
4 (3)^1/2
I’m pretty sure that the answer is D
Answer: The proportion that will qualify is 0.0314 or 3.14%.
First, we need to find the z-score of a time of 128 seconds. To do this, we find the difference of the mean and score and divide by the standard deviation.
(128 - 141) / 7 = -1.86
Now, use a standard normal distribution table to determine the percent below a z-score of -1.86. That value is 0.0314 or 3.14%.
