Sara runs a website that helps people learn programming. Every month, Sara receives a subscription fee of Dhs10 from each of the subscribers to her website. Last month, the website had 100 subscribers. This month, 30 new members joined the website, and 10 members canceled their subscription. How much money has she made those two months?

she made 2200 Dhs for those two months?

Step-by-step explanation:

Monthly subscription fee of Sara's website for each subscriber = Dhs 10

Last month, the website had 100 subscribers.

Last month Sara received subscription fee = 100 × 10

                                                                      = 1000 Dhs

This month, 30 new members joined the website, and 10 members canceled their subscription.

Total number of subscribers this month = (100 - 10)+30 = 120 subscriber

This month Sara received subscription fee = 120 × 10

                                                                       = 1200 Dhs

She made money those two months = 1000 + 1200

                                                             = 2200 Dhs

she made 2200 Dhs for those two months?

1. sometimes

2.   never

3   .08c = 7.50+.05c   250 pages

step-by-step explanation:

1.   sometimes

the theoretical probability of rolling a 1 is 1/6.   perhaps you got really lucky and never rolled a 1   in those 60 times.   your experimental probability is 0.   or perhaps you rolled a 1   20 times.   your experimental probability is 20/60 is 1/3.     it really just depends on how you rolled in that experiment.

2.   never

the probability of the event occurring is 1.   that is being 100 % sure it will happen.   that is the maximum amount of confidence we have.

3.   no customer card cost:   .08 times number of pages

customer card cost:   7.50 + .05 times number of pages

we want to find when it costs the same amount, so we will set these equal

let c = number of pages

.08c = 7.50+.05c

subtract .05c from each side

.08c-.05c = 7.5+.05c-.05c

.03c=7.5

divide each side by .03

.03c/.03 = 7.5/03

c =250  

the cost is the same at 250 pages