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andrey2020 [161]
2 years ago
15

If Rebecca reads 2pages per minute, how many pages could she read in 2 1/2 hours?

Mathematics
1 answer:
Mamont248 [21]2 years ago
3 0

Answer:

300

Step-by-step explanation:

2*60 for 1 hr

120*2 to find two hrs

2*30 for 1/2 hr

add

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if x is a positive integer, for how many dofferent values of x is square root 48 over x a whole number
Mazyrski [523]

Answer:

<h2><em>Therefore, for 3 values of 'x', the given fraction is a square. So, for those 3 values of 'x', the square root of the fraction will be a whole number. Thus, the answer is 3.</em></h2>
5 0
3 years ago
Find the limit, please
tino4ka555 [31]

Answer:

I think it's uhm twelve I'm not 100% sure though

4 0
1 year ago
Variation table of this <br> g(x)=2x^3 -x^2 -4x +6
Mrac [35]

Answer:

2x^{3} - x^{2}  - 4x +6

2x-x-4x^{3-2}+ 6

-3x+6

7 0
2 years ago
A manufactured lot of buggy whips has 20 items, of which 5 are defective. A random sample of 5 items is chosen to be inspected.
dimulka [17.4K]

Answer:

a. 39.55%

b. 44.02%

Step-by-step explanation:

We have the following data:

n = 5

x = 1

p = 5/20 = 0.25

to. If the sampling is done with replacement.

We apply the binomial distribution formula, which is as follows:

P = nCx * (p ^ x) * ((1-p) ^ (n-x))

Where nCx, is a combination, and is equal to:

nCx = n! / x! * (n-x)!

replacing we have:

5C1 = 5! / 1! * 4! = 5

replacing in the main formula:

P = 5 * (0.25 ^ 1) * ((1- 0.25) ^ (5-1))

P = 0.3955

that is, without replacing the probability is 39.55%

b. if the sampling is done without replacement.

Here it is a little different from the previous one, but what you should do is calculate three cases,

the first was the one at point a, when n = 5 and x = 1

5C1 = 5! / 1! * 4! = 5

the second is when n = 20 and x = 5, this is all possible scenarios.

20C5 = 20! / 5! * 15! = 15504

and the third is when n = 15 (20-5) and x = 4 (5-1), which corresponds to the cases when none were damaged

15C4 = 15! / 4! * 11! = 1365

In the end, it would be:

P = (5C1 * 15C4) / 20C5

Replacing:

P = 5 * 1365/15504

P = 0.4402

Which means that without replacing the probability is 44.02%

7 0
3 years ago
The ratio of two numbers is 1:4, and the sum of these numbers is 40. Find the numbers
Irina-Kira [14]
X + 4x = 40

5x = 40

5x/5 = 40/5

x = 8


1x 8 = 8

4x 8 = 32

Check=

8 + 32 = 40

The numbers are 8 and 32
3 0
2 years ago
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