How do i get the answer for this limit limit x to 0 (4^2x-1)

without using direct substitution my work so far is limit x to 0 = (4^2x-1) = (4^2x/4^-1) is it correct?

bob purchased a prepaid phone card for $15. long distance calls cost 18 cents a minute using this card. bob used his card only once to make a long distance call. if the remaining credit on her card is $12.30, how many minutes did her call last?

A man has 8 pairs of pants, 5 shirts, and 3 ties. How many different outfits can he wear?

Which ordered pair is a solution to this equation? 2x+3y=16 A.) (11, 1) B.) (7,2) C.) (5,2) D.) (3,2)

Sarah biked around a lake 2 times in 1/2 hour. what is her rate around the lake per hour

If gross pay increases by $500, total employee benefits increase by $200 and total job expenses decrease by $300, then total employment compensation

What is 2 1/2 / 1/3?

42+36 = use rounding or compatible numbers to estimate the sum

Elana spent 2.50 on pineapple juice pineapple juice costs. 10 per ounce. how many ounces of pineapple juice did Elana buy?

If a number is divisible by both two and three then we can save a number is divisible by

Which of the numbers 2, 3, 4, 5, 6 and 10 are factors of 1900