Answer:
C = 131.88 cm
Step-by-step explanation:
the circumference (C) of a circle is calculated as
C = 2πr ( r is the radius ) , then
C = 2 × 3.14 × 21 = 131.88 cm
Answer:
Step-by-step explanation:
If a given variable varies inversely with another variable, an increase in the value of the given variable would cause a corresponding decrease in the value of the other variable. Also, a decrease in the value of the given variable would cause a corresponding increase in the value of the other variable.
If y varies inversely with x, we would introduce a cost of variation, k so that the expression becomes
y = k/x
When y = 0.25, x = 8
Substituting into the expression above, it becomes
0.25 = k/8
k = 0.25 × 8
k = 2
The inverse variation function is
y = 2/x
Factor out 2 from the expression
2(x^4-10x^2-39)
Sorry but grade math is this so I can have a better understanding
Answer:
Step-by-step explanation:
The fruit flies grows geometrically.
Find the value of k.
is number of days.