Toni invests money into an account which pays a fixed rate of compound interest each year. the total value, ? v, of her investment after t years is given by the formula: v = 1350 x 1.04^t answer questions a & b a- how much money did toni invest in pounds b- what rate of compound interest is paid each year

a. $ 1,350

b. 4%

Step-by-step explanation:

a. Given function that shows the total value of Toni's investment after t years,

,

Initially, ( when he invested ),

t = 0,

Thus, the invested amount = = 1350(1) = $ 1,350,

b. Since, the amount formula in compound interest,

Where,

P = Initial amount,

r = annual rate per period,

n  = number of periods per period,

t = number of years,

Here, the amount is compounded annually,

i.e. n = 1,

By the given function,

By comparing,

r = 0.04 = 4%

Hence, 4% interest is paid annually.

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation: