The amount of money in brian's savings account is given by the function m (t) = 50t 2 + 100t + 80, where t is the time in years. approximately how many years will it take brian to save $1,000?

His money in the savings account is given by m(t)=

The rate at which he is saving money can be obtained by differentiating the function.

m'(t)= 100t+100

So, in one year he saves

1001+100=200

In two years he saves

1002+100=300

In three years he saves

1003+100=400

Therefore, time taken to save 1000 dollars is

100t+100=1000

100t=900

t=9

Therefore, it will take 9 years to save $1000.

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length