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3 years ago

Round 7.788 to the nearest hundredth.

Mathematics

1 answer:

nevsk [136]3 years ago

6 0

Answer:

7.79

Step-by-step explanation:

A hundredth is the second number after the decimal. For example, in the number 100.234, the "3" would be the hundredth, the "2" would be the tenth, and the "4" would be the thousandth.

To round to the nearest hundredth, you have to look at the thousandth because when rounding, you look at the next number to decide whether to round up or down.

Since 8 is in the thousandth place in this question, and 8 is bigger than 5, you round up. So, you round the "8" in the hundredths place up to 9.

Therefore, you get 7.79.

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a cooper wire was 240 meters long. after 60 meters was cut off, it was double the length of a steel wire. how much longer was th

Delicious77 [7]

The copper wire was 150 meters longer than the steel wire. You take 240-60 and get 180. You can then divide that number by 2 to figure out how long the steel wire was to get 90. From there, subtract the 90 by the original 240 and you’ll get 150.

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2 years ago

Read 2 more answers

3(squared)+4(squared)=r(squared)

nikdorinn [45]

Answer:

3^2 + 4^2= 25

Step-by-step explanation:

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2 years ago

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Four less than the product of a number and 7 is eight more than that number

GuDViN [60]

Answer:

Step-by-step explanation:

Replace the number with x, then the equation would be:

7x-4=x+8

7x-x=8+4

6x=12

6x/6=12/6

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2 years ago

The life of a manufacturer's compact fluorescent light bulbs is normal, with mean 12,000 hours and standard deviation 2,000 hour

ikadub [295]

Mean = 12000
Standard Deviation = 2000

We have to find how many standard deviations is 14,500 away from the mean.
This can be achieved by calculating the z-score

Z-score tells us how many standard deviations above or below is a sample value from the mean. A positive z value shows, sample value is above the mean.

z score can be calculated as = (Sample Value - Mean )/Standard Deviation)
So,
Z-score = $\frac{14500-12000}{2000} =1.25$

This means, 14,500 is 1.25 standard deviations above the mean value 12,000.

4 0

2 years ago

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A different way to solve a mixed-number addition problem

kompoz [17]

Answer:

Step-by-step explanation:

example :

2 1/4 + 3 1/2

you can either turn them to improper fractions, find the common denominator, and then add them and then convert that answer to a mixed number

2 1/4 + 3 1/2 = 9/4 + 7/2 = 9/4 + 14/4 = 23/4 = 5 3/4

separate them....add the whole numbers, then the fractions

2 1/4 + 3 1/2 .......2 + 3 = 5.....1/4 + 1/2 = 1/4 + 2/4 = 3/4.....now put them back together and u get : 5 3/4

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2 years ago