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AleksAgata [21]
3 years ago
10

Mr Fowler’s science class

Mathematics
1 answer:
dimaraw [331]3 years ago
3 0
Hello to Mr Fowler's science class from brainly!!!
You might be interested in
8.EE.1.2
Semenov [28]

Considering that the square root of 9 is of 81 and of 10 is of 100, we have that the expression that has a value between 9 and 10 is given by:

B.) √89

E.) \sqrt[3]{750}

F.) \sqrt[3]{999}

<h3>How the square root of a number is used to solve this question?</h3>

We suppose numbers n and m, with square roots given, respectively, by n² and m².

Then, the square roots of all numbers between n² and m² have values between n and m.

In this problem, the square roots are given by:

  • 9² = 81.
  • 10² = 100.

Hence, the square root of all values between 82 and 99 are values between 9 and 10, thus option B is correct.

As for the cubic root, we apply the same logic and have that:

  • 9³ = 729.
  • 10³ = 1000.

Hence options E and F are also correct, as the values between 730 and 999 have cubic roots between 9 and 10.

More can be learned about the value of a expression at brainly.com/question/25537936

#SPJ1

4 0
2 years ago
WILL MARK BRAINLIEST!
Slav-nsk [51]

Answer:

Second one and the fourth one.

Step-by-step explanation:

Let’s look at this. When we are finding the area of the rectangle, we multiply the length times the width. Let’s look at the first option.

2 times (x + 7)

2x + 14

this one won’t work.

second one:

14(x + 3)

14x + 42

this works.

thrid one.

14(x+5)

14x + 70

nope.

fourth one.

7(2x+6)

14x + 42

works.

fifth one,

2(7x +20)

14x + 40

Does not work.

4 0
3 years ago
Read 2 more answers
Ammonia, nh3 (delta.hf = –46.2 kj), reacts with oxygen to produce water (delta.hf = –241.8 kj) and nitric oxide, no (delta.hf =
poizon [28]

The enthalpy change (ΔH) for the reaction given the data from the question is –900.8 KJ

<h3>Data obtained from the question</h3>
  • 4NH₃ + 5O₂ —> 6H₂O + 4NO
  • Enthalpy of ammonia, NH₃ = –46.2 KJ
  • Enthalpy of Oxygen = 0 KJ
  • Enthalpy of water, H₂O = –241.8 KJ
  • Enthalpy of nitric oxide, NO = 91.3 KJ
  • Enthalpy change (ΔH) =?

<h3>How to determine the enthalpy change</h3>

ΔHrxn = ∑ΔH(products) - ∑ΔH(reactants)

ΔHrxn = ∑[H(H₂O) + H(NO)] - ∑[H(NH₃) + H(O₂)]

ΔHrxn = [(6 × –241.8) + (4 × 91.3)] – [(4 × –46.2) + (5×0)]

ΔHrxn = –1085.6 + 184.8

ΔHrxn = –900.8 KJ

Learn more about enthalpy change:

brainly.com/question/2364362

#SPJ4

4 0
2 years ago
Rachel invested $15,000 in a nine-year CD giving 8.5% interest, but needed to withdraw $4,000 after two years. If the CD's penal
drek231 [11]
Given:
Principal = 15,000
interest = 8.5%
term = 9 years

I = 15,000 * 8.5% * 9 years = 11,475
total amount after 9 years = 15,000 + 11,475 = 26, 475

Preterm after 2 years. wdl of 4,000. penalty is 6 months interest of 4,000

I = 4,000 * 8.5% * 6/12 = 170  amount of penalty
I = 15,000 * 8.5% * 2 years = 2,550 interest earned for 2 years

15,000 + 2,550 = 17,550
17,550 - 4,000 - 170 = 13,380 amount to be invested for another 7 years

I = 13,380 * 8.5% * 7 years = 7,961.10
total amount after 9 years with pretermination
 13,380 + 7,961.10 = 21,341.10
5 0
4 years ago
Read 2 more answers
Write an inequality.<br> The sum of a number and three is no more than eight or is more than twelve.
viktelen [127]

Answer:

8 ≥ x+3 or x ≥ 12

Step-by-step explanation:

The sum of a number (additon) and 3 (x+3) is no more than (so less than or equal to eight) OR is more than 12 ( x is more than 12,  x ≥ 12 )


8 0
3 years ago
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