CPhill

We have the points  ( -4, 0)  and ( 0, 2)   

And the slope of this line =

[  2 - 0 ] / [ 0 - -4]  =  2/4   = 1/2

And we have

y  = (1/2)(x - -4)

y  = (1/2)(x + 4)

y = (1/2)x + 2

Very nice, jeanne......!!!!

-6a²  bc - 12c + 3bcb     take out the greatest common factor = -3c

-3c ( 2a^2 + 4 - bd)

And that's all we can do.......!!!!   

[ If we knew the valuable of all the variables, we could just evaluate the original expression ]

A = A₀ (1 + r /n) ^n*t    where A is the accumulated amount, A₀ is the initial investment, r is the interest rate in decimal form, n is the number of compoundings per year and t is the number of years.....so we have

2500 = 1000(1 + .045/12)^12t     divide both sides by 1000

2.5  = ( 1 + .045/12)^12t              take the log of both sides

log (2.5)  = log ( 1 + .045/12)^12t     and we can write

log (2.5)  = 12t  log( 1 + .045/12)         divide both sides by 12log( 1 + .045/12)

t =  log(2.5) / [ 12log( 1 + .045/12) ]  = about 20.4 years

Edited answer.......!!!!!

y = a^x   take the ln of both sides

lny = lna^x    and we can write

lny =  ln a^x    exponentiate both sides

e ^(ln y)   = e^(ln a^x)

y  = e^(ln a^x)

y = e^(x ln a)    take the derivative

y ' = lna * e^(x ln a)

y '  = lna * e^(ln a^x)

y ' = lna * a^x      and we can write

dy / dx   = (ln a) * a^x

He makes 42 / 7   =  6 cakes per day

Can you take it from there???

I think you left out some information ..........

On the  onsite calculator....key in your number , then  the "^"  key on your keyboard and then the exponent.....then hit  " = "

Yep........!!!

Post your question.....we'll see what we can do.......