MATHEMATICS MIDDLE SCHOOL

many of the pesticides for citrus trees are toxic to fish. when the Citrus Groves on a large farm or treated with pesticides high winds deposited 1000 gallons of pesticides into a lake stocked with fish. To ensure survival of the fish 95% of the pesticides must be removed from the lake within 96 hours of contamination. There are two methods of removal: method A: the chemical Engineers have proposed adding a chemical reagent to the pond to neutralize the pesticide. This chemical reagent removes the pesticide at a rate of 11 gallons per hour. method B: the mechanical engineers have proposed fitting the pond with a filtration system. This system removes 4% of the remaining pesticides each hour. which method would you recommend to save the fish?

Answers

Answer 1
Answer: I recommend method A

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HIGH SCHOOL

Which property is illustrated by the following statement? 3+x=x+3

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Commutative Property of Addition 
COLLEGE

A teacher has 3 hours to grade all the papers submitted by the 35 students in her class. She gets through the first 5 papers in 30 minutes. How much faster does she have to work to grade the remaining papers in the allotted time?

Answers

So, she has 3hrs to grade all papers, for 35 students.. alrite.

the first 5, she does them in 30minutes.. what's the speed rate? well, 5/30 or 1/6

now, she has still 2 hours and a half, or 150 minutes, to do the remaining 30 papers... she has to work at a rate of 30/150 then... which is 1/5 simplified.

now if we take 1/6 as the 100%, what is 1/5 in percentage then?



so 1/5 is 120% in relation to 1/6... meaning the rate of 1/5 she needs to move through, namely 1 paper every 5 minutes, is 20% faster than 1/6.
At first, she was grading papers at 10 papers per hour. To meet her time limit, she would have to begin grading them at 12 papers per hour, or 20% faster than her previous rate
HIGH SCHOOL

Walter's savings account has a balance of $273. After 5 years, what will the amount of interest be at 5% compounded quarterly? a. $6.83 c. $77.00 b. $68.00 d. $82.00

Answers

The answer is 76.99 but rounded would make it 77.00 which is C

Answer:

c

Step-by-step explanation:

COLLEGE

A basketball player made 25 baskets in a season. Of these, 36% were three-point shots. How many three-point shots did he make? A. 16 B. 11 C. 5 D. 9

Answers

36% of 25 baskets were three-point shots
 = 0.36 x 25
= 9

So the correct answer is D. 9
MIDDLE SCHOOL

Which options could be the next step in simplifying this expression? (18 + 23) + 7 Choose exactly two answers that are correct.
A. 18 + 30 (use the associative property)
B. 41 + 7 (use order of operations)
C. 30 + 25 (use the commutative property)
D. 25 + 30 (use the distributive property)

Answers

In adding, subtracting, multiplying and dividing numbers, always remember this rule: PMDAS (or parenthesis, multiply, divide, add, subtract). The P in PMDAS must come first. We must use an order of operations. In the problem given, (18 + 23) + 7, they must be added. However you have a parenthesis that has the numbers 18 and 23. You will add 18 and 23 first and then you will get 41. And so the answer is 41 + 7, letter B. 
HIGH SCHOOL

There are 100 pennies in a dollar what fraction of a dollar is 61 pennies write it as a fraction , as a decimal and in word form

Answers

Fraction       decimal         word form
61/100         0.61             61 out of 100
MIDDLE SCHOOL

hey test was passed by 90% of the class if 27 students passed the test how many students were in the class?

Answers

So 1% is 2.7 so multiply it by 9 to get 24.3.
30 students were in the class
MIDDLE SCHOOL

Write a set of three numbers that have a GCF of 13

Answers

13,26,32 are the multiples of 13 but 13 is a prime number
HIGH SCHOOL

asmine works at the public library after school. She makes $7.00 per hour. She cannot work more than 15 hours per week. If y = 7x represents Jasmine's earning, what are the values in the domain?

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(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15) are the domains
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