F (her fastest time) = 730 -31
S (her slowest time) =730 +31
<h3>
Answer: 4 minutes</h3>
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Explanation:
Let's say that this tub is 72 gallons. I picked this number since 12*6 = 72. You can pick any number you want, but I picked this number so we end up with whole number results as shown below.
Tap X can fill the 72 gallon tub in 12 minutes. Its rate is 72/12 = 6 gallons per minute. Tap Y has a rate of 12 gallons per minute because 72/6 = 12.
Add the two unit rates: 6+12 = 18
If the two taps are opened at the same time, then they will work at a rate of 18 gallons per minute.
Let x be the number of minutes. The expression 18x represents how much of the tub is full after x minutes. Set this equal to the 72 we started with earlier and solve for x.
18x = 72
x = 72/18
x = 4
It will take 4 minutes if both taps are running at the same time.
Add 't' to both sides. t+r=s
Step-by-step explanation:
For this case we have that by definition, the surface area of a cone is given by:
Where:
r: It is the cone radius
s: It's the slant height
According to the data we have:
Substituting:
Thus, the surface area of the cone is 
Answer:
Option B
