An electric current alternates sinusoidally with a frequency of 60 cycles per second. At time t = 0.1 seconds, the
current is at its maximum of 1 = 10 amperes. Which
function describes I as a function of time, t.
t=
30
o I(t) = 10 cos (120đ(t – 0.1)) + 5
ol(t) = 5 cos (120#(t – 0.1)) + 5
° 10) = 10 cos (o 4 – 0.1)) +5

56

step-by-step explanation:

d. all of the above

step-by-step explanation:

113.42

i hope that is right.

step-by-step explanation:

(a) {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …}

(b) $59 398

step-by-step explanation:

(a) the annual sequence of profits

aₙ = a₁rⁿ⁻¹

the model for the sequence of profits is {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …} .

(b) profit after 15 yr

  a₁ = $ 30 000

  r = 1.05

a₁₅ = 30 000 × 1.05¹⁴

a₁₅ = 30 000 × 1.979 93

a₁₅ = $59 398

the profit in year 15 will be $59 398.