Lacey drops a stone off a cliff. The speed of the stone changes as it falls. The speed is modelled using the formula v= 10t + 15, where v represents the speed of the stone, in metres per second, and t represents the time, in seconds. a) What is the speed of the stone one second after it is dropped?

b) At what time is the speed of the stone 45 m/s?

((see pic of textbook question if wanted))

answer: sherk

step-by-step explanation:

just give up and watch the best anime ever sherk

(a) common ratio in the given sequence is, 3

(b) push ups will do kendall do on the 20th week

step-by-step explanation:

geometric sequence is a sequence of numbers that follows a pattern were the next term is found by multiplying by a constant called the common ratio(r)

(a)

given the sequence: 6 , 18 , 54 , 162 ,

this sequence is geometric sequence where each term is 3 times the previous term.

therefore,

common ratio(r) = 3.

(b)

a formula for nth term of geometric sequence is given by;

,   where r is the common ratio between the successive terms and is the first term,

to find how many push ups will kendall do on the 20th week.

here. n = 20th term.

in the given sequence first term

then;

simplify:

therefore, push ups will do kendall do on the 20th week

cluster sampling.

step-by-step explanation:

4+3x hope you like mark as brainliest✔