Answer:
78 inches.
Step-by-step explanation:
By definition, a foot is equal to 12 inches. That is modeled by the equation you wrote, y = 12x, where x is the amount of feet.
Substitute 6.5 for x. y = 12*6.5 = 78 inches.
I hope this helps!
Answer:
4.R=16
D=16+16=32
C=

C=32π
then do the same thing for other problem
Answer:
The doubling time of this investment would be 9.9 years.
Step-by-step explanation:
The appropriate equation for this compound interest is
A = Pe^(rt), where P is the principal, r is the interest rate as a decimal fraction, and t is the elapsed time in years.
If P doubles, then A = 2P
Thus, 2P = Pe^(0.07t)
Dividing both sides by P results in 2 = e^(0.07t)
Take the natural log of both sides: ln 2 = 0.07t.
Then t = elapsed time = ln 2
--------- = 0.69315/0.07 = 9.9
0.07
The doubling time of this investment would be 9.9 years.
Answer:
a) 
b) 
c) 
d) E(3X + 2) = 21.35
e) 
f) V(3X+2) = 140.832
g) E(X+1) = 7.45
h) V(X+1) = 15.648
Step-by-step explanation:
a) 

b)

c)

d)

e)

f)

g)

h)

Answer: 4/2
Step-by-step explanation: Rise over run. From point S to R it goes up 4 and over 2.