Answer:

Step-by-step explanation:
1. take 10 times a and get 10a and put in the numerator spot of your answer
2. then do 15 times 20 which is 300 so add 300 to 10a in the numerator spot of your answer
3. multiple 20 times 10 which is 200 and make it your denominator of your answer
This method is called the butterfly method
Answer:
-88 mph
Step-by-step explanation:
We can use the relation ...
time = distance/speed
to compare the times in the two directions.

The wind speed is -88 miles per hour.
_____
The problem statement tells us the travel is slower <em>with</em> the wind than <em>against</em> the wind. Hence "with the wind" must be subtracting from the net speed. That is, the wind speed is negative.
Answer:
<h2> 157</h2>
Step-by-step explanation:
Let us first calculate the circumference of the circular of the circular garden

Given
r= 100

Since the desired space between flowers is 4ft
Then the flowers needed for the garden is 
Approximately the number of flowers is 157
P(<em>Z</em> ≥ <em>z</em>) = 1 - P(<em>Z</em> ≤ <em>z</em>) = 0.06
==> P(<em>Z</em> ≤ <em>z</em>) = 0.94
==> <em>z</em> ≈ 1.7507