Answer:
576.2
Step-by-step explanation:
The formula for the area of a triangle is
. Since this square pyramid is essentially four triangles with base length 21.5 feet and height 13.4 feet, we can calculate the area that they take up with the formula
square feet. Hope this helps!
Answer:
You can use a calculator for the decimal operations, but practice some by hand because on the quiz and the test you will not have a calculator.
Step-by-step explanation:
Answer:
8.1 hours
Step-by-step explanation:
A model of the fraction remaining can be ...
f = (1/2)^(t/37) . . . . t in hours
So, for the fraction remaining being 86%, we can solve for t using ...
0.86 = 0.5^(t/37)
log(0.86) = (t/37)log(0.5)
t = 37·log(0.86)/log(0.5) ≈ 8.0509 ≈ 8.1 . . . hours
It takes about 8.1 hours to decay to 86% of the original concentration.
If

, then we can write

and since this is continuous for all

, the limit as

will be