Do you need help with all of these?
Answer:
530.66 square cm
Step-by-step explanation:
A=pi*r^2
A=pi*13^2
A=530.66
Answer:
B.
Step-by-step explanation:
The given matrix is
The determinant of this matrix is
Since the determinant is not zero, it means the inverse exists.
The inverse is given by
The correct choice is B.
(21+39a)/20. Because they have to have the same denominator
15 ft = 15*12 = 180 inches
180/4 = 45
so the scale is 1/45