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andre [41]
3 years ago
8

8 x 10^3 is how many times as large as 4 x 10^2?

Mathematics
2 answers:
DochEvi [55]3 years ago
8 0
Your answer for the question would be 400
Bond [772]3 years ago
6 0

8 * 10^3 is larger than 4 * 10^2

10*10*10 = 1000 * 8 = 8000

10*10= 100 * 4 = 400

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A random sample of 60 mathematics majors spent an average of $200.00 for textbooks for a term, with a standard deviation of $22.
tangare [24]

Answer:

20 +/- $6.74

= ( $13.26, $26.74)

The 90% confidence interval for the difference in average amounts spent on textbooks (math majors - English majors) is ( $13.26, $26.74)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x1-x2 +/- margin of error

x1-x2 +/- z(√(r1^2/n1 + r2^2/n2)

Given that;

Mean x1 = $200

x2 = $180

Standard deviation r1 = $22.50

r2 = $18.30

Number of samples n1 = 60

n2 = 40

Confidence interval = 90%

z(at 90% confidence) = 1.645

Substituting the values we have;

$200-$180 +/-1.645(√(22.5^2/60 +18.3^2/40)

$20 +/- 6.744449847374

$20 +/- $6.74

= ( $13.26, $26.74)

The 90% confidence interval for the difference in average amounts spent on textbooks (math majors - English majors) is ( $13.26, $26.74)

3 0
3 years ago
Given the diagram below, what is cos(45")?<br> 45° 6 <br> A. √2<br> B. 6/√2<br> C. 1/√2<br> D. 3√2
Gnesinka [82]
C. 1/root2

Based on the information, the hypotenuse will be 6root2 because it is a 45, 45, 90 triangle. The two legs will be 6. Using SOH CAH TOA, we know that for cosine, it will be adjacent/hypotenuse. The adjacent side is 6 and the hypotenuse is 6root2. The result will be (6)/(6root2). After simplifying, we get
1/root2.
3 0
1 year ago
How do you calculate tan^-1 (10/53)
frez [133]

Answer:

Use you calculator.

Step-by-step explanation:

There will be a way on your calculator to do tan^-1. It may be called arctan. They are the same thing.

5 0
3 years ago
Pls help .............................
Mice21 [21]
Pythagorean theorem you times 40 by 2 then 9 by 2 then square root
4 0
2 years ago
What is “2 1/2 x 3 1/3”
lesya692 [45]

Answer:

The answer is 8.3 bar notation.

Step-by-step explanation:

2 1/2 into improper is 5/2

3 1/3 into improper is 10/3

Now Multiply

5/2 x 10/3 is 300/36

Now Reduce.

25/3 = 8.3 bar notation

Mark Brainliest!

3 0
2 years ago
Read 2 more answers
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