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AfilCa [17]
3 years ago
9

20 PTS

Mathematics
1 answer:
Svetach [21]3 years ago
8 0

Answer:

399 cars will be sold in 2020

Step-by-step explanation:

Using exponential decay formula:

y = a(1 - r)^{x}

a = intial value at 2012 : 500

r = 2.8 %

= \frac{2.8}{100} = 0.028

x = time interval : 8

y = 500 (1 - 0.028)^{8} \\y = 500 (0.972)^{8}\\y = 500 (0.797)\\ y = 399

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Answer:

B.

Step-by-step explanation:

The sample size taken for the school is too small.

5 people not being vegetarian does not mean NO OTHER students are vegetarian also. Thus, an assumption based on this probability of 5 people would not be correct unless fully supported. This makes option A wrong.

Answer B is correct because with small numbers, probability varies a lot and may change drastically with the addition of data.

For example: the 6th person we sample says he/she is a vegetarian.

This would change the probability drastically to 1/6 = 0.1667

Because this is a drastic change, and fluctuation is clear, answer B is correct.

C is wrong because probability is not subjective.

7 0
3 years ago
At soccer practice last night, Leroy made 4 times as many penalty kicks as he missed.
Alex17521 [72]

45

explanation

9 x 4 + 36

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3 0
3 years ago
The directions on a sewing pattern say to cut an extra 15% of fabric to account for error. Chloe needs 0.75 yardof fabric to mak
Vlada [557]

Answer: D. Chloe did not cut enough fabric because she only cut the amount of extra fabric.

Step-by-step explanation:

From the question, we are informed that a direction on a sewing pattern say to cut an extra 15% of fabric to account for error and that Chloe needs 0.75 yard of fabric to make a skirt.

Based on the information given in the question, the extra fabric will be:

= 15% × 0.75

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= 0.15 × 0.75

= 0.1125

Therefore, the correct amount of fabric to cut will then be the amount of yard needed for the skirt plus the extra. This will be:

= 0.75 + 0.1125

= 0.8625 yards

Based on the above calculation, Chloe did not cut the correct amount of fabric as she only cut the amount of extra fabric.

3 0
3 years ago
Sum of numbers 12-111
liubo4ka [24]

Answer:

12-111=-99

Step-by-step explanation:

7 0
2 years ago
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Answer:

B

Step-by-step explanation:

In the attached file

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3 years ago
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