MATHEMATICS HIGH SCHOOL

Each hour, the number of bacteria in Dr. Nall’s petri dish tripled. What percent is the population compared to the population the hour before?A. 3%
B. 30%
C. 130%
D. 300%

Answers

Answer 1
Answer:

Answer:

Option D. 300%

Step-by-step explanation:

Let the number of bacteria in Dr Nall's petri dish = x

After one hour number of bacteria in the petri dish = 3x

So the percentage of the population compared to the population the hour before will be

= \frac{\text{Population after 1 hour}}{\text{Population before 1 hour}}* 100

= (3x)/(x)* 100

= 300%

Therefore, Option D. will be the answer.
Answer 2
Answer: THE ANSWER IS THE D!!!!!!!!!!!!

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Which algebraic expression represents the phrase “the quotient of negative eight and the sum of a number and three”?

Answers

Quotient: division

Negative 8: -8

Sum of a number: let the unknown number be represented by x

And Three: x + 3

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You have just purchased a 6-lb bag of apples for $4.80 at a local produce stand. How much would you expect to pay for a 10-lb bag of apples?

Answers


First, find out how much money it cost per 1 lb of apples.

Divide $4.8/ 6 lbs

$0.8/ 1 lbs

Multiply amount per pound by cost

0.8 * 10 = 8

$8.00 for 10 lb bag of apples.

Given the following information, choose the brand that is the better buy.Brand A: $1.25 for 10 ounces
Brand B: $1.47 for 12 ounces
Brand C: $1.68 for 14 ounces
Brand D: $1.84 for 16 ounces

Answers

By using proportions, it is found that the better buy would be d. Brand D: $1.84 for 16 ounces.

What is a proportion?

A proportion is defined as the fraction of a total amount.

In the given problem, the better buy will be given by the lowest ratio of price to ounces.

Hence:

1.25/10 = 0.125

1.47/12 = 0.1225

1.68/14 = 0.12

1.84/16 = 0.115

Hence brand D is the better buy.

More can be learned about proportions;

brainly.com/question/24372153

#SPJ2
The best buy would be Brand D, because you get more for the money you spend. $1.84 for 16 oz of product comes to .115 cents per ounce which is the cheapers per ounce price of the 4 brands.

1 Identify whether the series summation of 16 open parentheses 5 close parentheses to the I minus 1 power from 1 to infinity is a convergent or divergent geometric series and find the sum, if possible.A This is a convergent geometric series. The sum cannot be found. (I think this)

B This is a divergent geometric series. The sum cannot be found.

C This is a convergent geometric series. The sum is –4.

D This is a divergent geometric series. The sum is –4.

Answers

sum to infinite for
1) arithmetic series is always divergent, sum is infinite.
2) geometric series is convergent if -1 < common ratio < 1 otherwise it is divergent.

b) is correct , (r = 5) > 1

When their report cards came back, Pete, Chris, and Dina realized that the number of A's they each received was in the ratio 4:2:5. If Pete got 14 more A's than Chris, how many A's did Dina get?

Answers

Answer:

The number of A's Dina got = 5/11 × 77 = 385/11 = 35

Step-by-step explanation:

The number of A's Pete , Chris and Dina received are in the ratio of 4:2:5.

Let the total number of A's = y

Total from ratio = 4 + 2 + 5 = 11

chris A's = 2/11 × y  

pete's A's = 2/11 × y + 14 = 4/11 × y

pete's A's

2/11 y + 14 = 4/11 y

14 = 4/11 (y) - 2/11 (y)

14 = 2/11 (y)

cross multiply

2y = 14 × 11

divide both sides by 2

y = 154/2

y = 77

Total number of A's = 77

The number of A's Dina got = 5/11 × 77 = 385/11 = 35

Answer:

35

Step-by-step explanation:

Given f(x) = –5x + 1, what is f(–2)?A.
3/5

B.
-9

C.
11

D.
1

Answers

-5(-2)+1 10+1=11 Your answer is C
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