MATHEMATICS MIDDLE SCHOOL

Solve 247 divided by 10(^2) . and 247x10 (^2)

what's different about the two answers?

Answers

Answer 1
Answer: 247 divided by 10^2 is 2.47 and 247 times 10^2 is 24,700

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What is 2 to the 10th power in scientific notation

Answers

1.024x 10^3 is the answer
2 to the 10th power is 1024
hope that helps!

Kiwi fruits weight ~ The weight of Kiwi fruits is normally distributed with an average weight of 76 grams and a standard deviation of 3.6 grams.What proportion of Kiwi fruits have weights between 70 and 80 grams? Enter your answer to 4 decimal places.

Answers

Answer:

0.8190

Step-by-step explanation:

The weight of Kiwi fruits is normally distributed with an average weight of 76 grams and a standard deviation of 3.6 grams.

We want to find the proportion of Kiwi fruits that have weights between 70 and 80 grams.

We find the z-scores of 70 and 80 using

z = (x - \mu)/( \sigma)

For 70, the z-score is:

z = (70 - 76)/(3.6) = - 1.67

The area corresponding to a z-score of -1.67 on the standard normal distribution table is 0.0475

For 80, the z-score is:

z = (80 - 76)/(3.6) = 1.11

The area to the corresponding to a z-score of 1.11 is 0.8665

The area between the two z-scores is 0.8665-0.0475=0.8190

Therefore the proportion of Kiwi fruits have weights between 70 and 80 grams is 0.8190

How can I work out 30% of (blank) is 60?

Answers

0.3x=60\n x=200

Whole numbers greater than 25 but less than 33

Answers

So 26 27 28 29 30 31 32 right I think that's what your asking because whole numbers have no decimals
Well, the question simply means that you should give all the numbers between 25 and 33. And those are;
26, 27, 28, 29, 30, 31, 32
  Hope i helped. Have a nice day.

Can someone please do number 30.

Answers

To\ find\ b\ you\ have\ to\ put\ (2,6)\ into\ second\ eqution:\n\ny=2.5x+b\n\n6=2.5\cdot2+b\n6=5+b\n6-5=b\nb=1\n\nb\ have\ to\ be\ equal\ 1.

Full in the missing reason for each step of proof?

Answers

5x + 3y + 2(x + y) = 5x + 3y + 2x + 2y . . . . . . . . (opening up the bracket)
                             = 5x + 2x + 3y + 2y . . . . . . . . (rearranging terms)
                             = 7x + 5y
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