So there are 38 +32 = 70 and for the rest 30 we can assuming 15 + 8 +7
38+32+15+8+7=100
hope this will help you
Answer:
405 cm²/s
Step-by-step explanation:
The dimensions are increasing at the rate of 3 cm/s, so the dimensions in cm can be described as a function of time by ...
3 + 3t
and
6 + 3t
Then the area is the product of these, or ...
A = (3 +3t)(6 +3t)
A = 9t² +27t +18
and the rate of change of area is given by its derivative with respect to t:
A' = 18t +27
When t=21, the value of this is ...
A'(21) = 18·21 +27 = 405 . . . . cm²/s
12/x + 7 =13/x, where x is not 0;
<=> 12 + 7x = 13 <=> 7x = 1 <=> x = 1/7;
Perimeter of Figure = Perimeter of 2 semicircles + Measures of two straight line
P = 2(πr) + 2*x
P = 2*3.14*7 + 2*13
P = 43.96 + 26
P = 69.96 m
In short, Your Answer would be: Option C
Hope this helps!
