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antoniya [11.8K]
3 years ago
12

li needs 15 pieces of string each 1/2 of a inch long. she cut a 6-inch piece of string long . how many more pieces of string doe

s she need ?
Mathematics
2 answers:
Lilit [14]3 years ago
8 0
15 pieces times 0.5 equals 7.5 inches. 7.5 in-6in= 1.5 inches. 1.5 inches/0.5 inches= 3 pieces. She would need 3 more pieces.
faltersainse [42]3 years ago
4 0

Answer: 3 pieces of string.


Step-by-step explanation:

Given: Li needs 15 pieces of string each 1/2 inch long.

Thus, total string required by Li =15\times\frac{1}{2}\text{inch}=7.5\text{inches}

As she cut a 6-inch piece of string .

So the length of string she needs=7.5-6=1.5

Since, each piece of string has length 1/2 inch or 0.5 inch, then the number of pieces she need =\frac{1.5}{0.5}=3

Hence, she need 3 pieces of string.

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7 0
3 years ago
Help me please having trouble!?
nlexa [21]
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5 0
3 years ago
Let X denote the time from the present until the stock market hits 25,000. If X ≤ 1, you win $10, 000X. If X > 1, you win not
const2013 [10]

Answer: $6321

Step-by-step explanation:

Expected value is given as exactly what you might think it means intuitively, the return you can expect for some type of action.

The basic expected value formula is the probability of an event multiplied by the amount of times the event happens:(P(x) * n).

he formula for the Expected Value for a binomial random variable is:

P(x) * X.

X is the number of trials and P(x) is the probability of success.

The formula for calculating the Expected Value where there are multiple probabilities is:

E(X) = ∑X * P(X)

The equation is basically the same, but here you are adding the sum of all the gains multiplied by their individual probabilities instead of just one probability.

Calculating the expected value of winning as follows:

Given,

Fx= e^-x, x is greater or equal to 0

Now, P less than or equal to zero =

[-e^-x] ^1

e^-0 - e^-1

= 1 - e^-1

= 0.6321

and P(x>1) = 1-0.6321= 0.3679

Therefore,Let y= amount of winnings.

Based on the above given information,

y= $10000 0

P(y)= 0.6321 0.3679

The expected value of winning:

E(y) = ΣyP(y)

E(y) = 10000 × 0.6321 + 0 × 0.3679

E(y) = $6321

Therefore, the expected value of winning is $6321

5 0
3 years ago
PLEASE HELP ME!! I need you to solve this inequality.<br> 2/3x - 1/5 &gt; 1
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Answer:

If you are trying to solve the inequality for "x" Then your answer is, <u><em>"x>9/5" </em></u>That is the inequality form. If you are looking for the interval notation form then your answer is <u><em>"9/5, infinity" </em></u>

Step-by-step explanation:

I have checked my answers against an online Algebra solver. So my answers are 100% correct.

<u><em>PLEASE MARK BRAINLIEST</em></u>

7 0
2 years ago
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mrs_skeptik [129]

Answer:

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Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
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