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zimovet [89]
3 years ago
14

Which of the following is the same as 8.4 × 10 to the second power?

Mathematics
2 answers:
Bess [88]3 years ago
4 0
I believe the answer would be C.) 840
stich3 [128]3 years ago
3 0
1) 8.4 \times 10^{2}  is the same as 8.4 \times 100 because the order of operations state to perform the exponents before multiplication. 
8.4 \times 100 = 840

The answer is C) 840

2) I'm assuming the second thing you said was a typo, but 8.4 × 10*2 is the same as 8.4 x 20, for the same reason above. 8.4 x 20 = 168.
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Please urgent fast thanks
stich3 [128]

Answer:

A) I = $171.73

B) $4771.73

Step-by-step explanation:

We are told her loan is $4600 for 7 months.

Thus;

Principal; P = 4600

Time; T = 7 months = 7/12 year

Interest rate is given as 6.4%

Thus; r = 6.4

A) To get the interest, the Formula is;

I = PRT/100

I = (4600 × 6.4 × (7/12))/100

I = $171.73

B) Since interest is $171.73, it means amount she owes after the 7 months = $4600 + $171.73 = $4771.73

6 0
3 years ago
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sesenic [268]

Answer:

135

Step-by-step explanation:

3 0
3 years ago
Simplify 5 + 2{x - 4[3x + 7(2 - x)]}.
spin [16.1K]

the answer is 

Remove unnecessary parentheses.<span><span>5+2x+16x−56</span><span>5+2x+16x-56</span></span>
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Add <span><span>2x</span><span>2x</span></span> and <span><span>16x</span><span>16x</span></span> to get <span><span>18x</span><span>18x</span></span>.<span>18x−<span>51</span></span>
7 0
4 years ago
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Ken has an investment account which compounds interest continuously at a rate of 3.4%. After 4 years, he has $4400 in the accoun
Maksim231197 [3]

Answer:

$6617

Step-by-step explanation:

Use the formula for calculating compound interest A=P0ert where A is the unknown, P0=4400, r=0.034, and t=12. Substitute the values into the formula and simplify.

A=4400e0.034⋅12

A=4400e0.408

A=4400(1.503...)

A=6616.75

After 12 years, there will be A≈6617 in the account, rounded to the nearest dollar.

5 0
3 years ago
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Using the discriminant determine the number of real solutions -4x^2+20x-25=0
seraphim [82]
I think it's c I'm not too sure
5 0
3 years ago
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