What is the answer please

First bottle unit cost: 80/55=16/11 pounds per ml

Second deal, buy 50ml for 45pounds and get one more at half price, unit cost of

(50 + 50) / (45 + 45/2) = 40/27 pounds per ml

Which is bigger?  Let's try without the calculator.

16/11 - 40/27 = ( 16(27)-11(40) ) / 287= (432 - 440) / 287 < 0

16/11 is a smaller unit cost.

80 ml bottle is a better value

he spend 5.1 minutes chatting with his friends.

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5.1

stew reads at the fastest rate of 265 words per minute.

step-by-step explanation:

it's a given that felicia reads at 260 word per minute and on connie's graph we can see that she reads 200 words per minute. since stew's table tells us that he read 795 in 3 minutes, we can divide 795 by 3 to find out how many words he reads per minute.

795/3 = 265

stew reads 265 words per minute - he reads at the fastest rate since felecia reads at 260 words per minute and connie reads at 200 words per minute.

stew (265) > felecia (260) > connie (200)