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NNADVOKAT [17]
3 years ago
7

Maria took a math test last week. The table shows how many questions she answered correctly and incorrectly.

Mathematics
1 answer:
pashok25 [27]3 years ago
5 0

Answer:

Step-by-step explanation:

Maria had a test with 20 questions

if 17 are correct,

20 questions................................100%

17 questions................................?%

she was 85% right

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Suppose the population of a small country is 875,000 and growing at an annual rate of 3%. Identify the rate as either a growth r
just olya [345]

Answer:

Need to calculate 3% of 875 000 which is equal 26250

8 0
3 years ago
When plotting sample statistics on a control chart, 99.7% of the sample statistic values are expected to fall within plus/minus
Blababa [14]

Answer:

By the Empirical Rule, \pm 3\sigma

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

The symbol of a standard deviation is \sigma. So

When plotting sample statistics on a control chart, 99.7% of the sample statistic values are expected to fall within plus/minus how many sigma?

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5 0
3 years ago
the height of the rectangular box is 4 times its width, and its length is 2 in more than its width. the volume of the box is 60i
alexandr402 [8]

Step-by-step explanation:

height= 4b

length = 2 + b

volume = 60in³

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or, (2+b) × b × 4b = 60in³

or, 4b²(2+b) = 60in³

or, 8b² + 4b³ = 60

or, 2b² + b³ = 15

or, b³ + 2b² -15= 0

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4 0
2 years ago
How do you write 1.801 as a percentage
Norma-Jean [14]

Answer:

180.1%

Step-by-step explanation:

As a rule, when converting from a number to a percentage, you multiply by 100. Therefore, 1.801 = 180.1%

8 0
2 years ago
Solve 2a + 21 = 8a - 9, step by step
Rom4ik [11]
2a + 21 = 8a - 9

Combine like terms. 

2a + 21 = 8a - 9
-2a          -2a

21 = 6a - 9 
+9          +9

30 = 6a
6a/6 = 30/6
a = 5

Answer: a = 5
6 0
3 years ago
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