A formula connecting speed(s), distance(d) and time(t) is s = d/t, where d = 160km to 2 s. f. and t = 7.2 min to 2 s. f. Work out the upper and lower bounds for s.

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58

correct answer is c. just did it

step-by-step explanation: