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Oksi-84 [34.3K]
3 years ago
8

Estimate the value of this expression by rounding each number to the nearest whole unit. (1.74)(9.95)(3.46) A. 80 B. 54 C. 60 D.

72
Mathematics
1 answer:
Vlada [557]3 years ago
4 0
The answer is C. 60 because if you multiply 1.74*9.95*3.46 you will get 59.90298 and if you round to the nearest whole then it's 60
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The answer is x² +5x -8x
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If Georgina travels 455 km in 7 hours how far will she travel in 9 hours at the same rate
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Read 2 more answers
An airplane traveled 700 kilometers in two hours during a trip. What was the average speed of the plane during the trip?
Igoryamba

9514 1404 393

Answer:

  350 km/h

Step-by-step explanation:

Speed = distance/time

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The average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13, 2006). Do male and female consume
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Step-by-step explanation:

We can express the null and alternative hypothesis as:

H_0: \mu_m=\mu_w\\\\H_1:  \mu_m\neq\mu_w

It is assumed a significance level of 0.05.

The standard deviation of the difference of means is calculated as:

s=\sqrt{\frac{s_m^2}{n_m} +\frac{s_w^2}{n_w} } =\sqrt{\frac{35^2}{40} +\frac{20^2}{30} } =\sqrt{30.625+13.333} =\sqrt{43.958} =6.63

The test statistic is

t=\frac{(M_m-M_w)-0}{s}=\frac{135.67-68.64}{6.63}=10.11

The degrees of freedom are:

df=n_1+n_2-2=40+30-2=68

The P-value for t=10.11 is P=0, so it is smaller than the significance level. The null hypothesis is rejected.

We can conclude that male and female consumers differ in the amounts they spend.

5 0
3 years ago
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Answer:

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Step-by-step explanation:

It's 70 because first you have multiply for Cindy's words 65×7=455 then multiple David's 75 word times 7 and you get 525. Lastly, You subtract both of their totals and get 70

Hope this helped!

6 0
3 years ago
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