Express the integral as a limit of Riemann sums. Do not evaluate the limit. (Use the right endpoints of each subinterval as your sample points.) ∫ 6x1 + x^3 dx

n

lim Σ

n→[infinity] i=1

step-by-step explanation:

-6 is the correct option from the above given options

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

i think its a and d

step-by-step explanation: