Christa 10 deposit in a bank pays % interest compounded annually. She notes that at the end of N years the balance of her account will be B = 10 * (1.05) ^ N About how many years will take for her deposit to double in value? A~ N=log20/10log1.05
B~ N=log2/log1.05
C~ N=10/1.05
D~ N=log20/10.5

go on the tube you might find some information there

-2 is the right

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)