Mrs. santos is buying binders for the students in her class. she determined that 15 binders would cost $22.50.if all of the binders cost the same amount, which statement is true? it will cost $12 for 18 binders. it will cost $20 for 30 binders. it will cost $42 for 28 binders. it will cost $48 for 48 binders.

Option C It will cost $42 for 28 binders

Step-by-step explanation:

Mrs. Santos determined that 15 binders would cost = $22.50

Therefore, 1 binder would cost = $1.50

Now we calculate each statement :

a. 18 binders will cost $12

= 18 × $1.50 = $27.00 (not correct)

b. 30 binders will cost $20

= 30 × $1.50 = $60.00 (not correct)

c. 28 binders will cost $42

28 × $1.50 = $42.00 (Correct)

d. 48 binders will cost $48

48 × $1.50 = $72.00 (not correct)

Option C It will cost $42 for 28 binders would be correct.

linearly: 8560 bacteria

exponentially: approximately 75233 bacteria

step-by-step explanation:

assuming it is not exponential (we would have some really complicated logarithms), let's say it is linear. then, after 5 hours, it increased by 1200 bacteria, so every hour it increases by 240 bacteria. this means that after 19 hours, we get 19 * 240 + 4000 bacteria or 3800 + 760 + 4000 = 7800 + 760 = 8560 bacteria.

because it says round your answer, i will do this exponentially (with a calculator, of course). first, we need to find how much it multiplies by every hour, by taking the 5th root of 52/40 or 13/10. this is approximately 0.167. we still need to add 1 to this, because we are multiplying by that number, not adding that amount of the number. now, we just calculate 4000 * (1.167)^19. use a calculator to get approximately 75232.6, or 75233.

step-by-step explanation:

i could only see the first page. the other pages were blurry. ; -;

x hot dogs for 2$, y drinks for 3$. 29 items and total 70

2x+3y=70

x+y=29

if x=17and y=12

2(17)+3(12)=70

34+36=70