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3 years ago

Ava invested $470 in an account in the year 2000, and the value has been growing

2 answers:

algol133 years ago

6 0

I’m pretty sure $1,800 Because if you subtract 660 by 470 you get 190 and it you multiply 190 by 6 years you get 1140 and if you add 1140 and 660 you get 1,800

7nadin3 [17]3 years ago

5 0

Answer: 992

Step-by-step explanation:

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Davey built a bookshelf 36 in. long. Can the shelf hold a set of encyclopedias if there are 24 books and each book averages 5/4

grin007 [14]

Yes, the 36" shelf can hold all 24 books. As 5/4=1.25" meaning, you take 1.25X24=30". So 24 books only take up 30 inches of a 36 inch shelf.

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3 years ago

Sam have 10 books and Mary have 10 books too how manny books they all have

andreev551 [17]

Sam and Mary have 20 books.

8 0

3 years ago

Read 2 more answers

What is 5 + 72? a 81 b 72 c 5 d 62

maxonik [38]

The answer is 77 but i don't see it as an option here ;/

6 0

3 years ago

At a carnival, contestants are asked to keep rolling a pair of dice until they roll snake eyes. The number of rolls needed has a

Stells [14]

Answer:

The two numbers of rolls are 25.2 and 46.8.

Step-by-step explanation:

The Chebyshev's theorem states that, if X is a r.v. with mean µ and standard deviation σ, then for any positive number k, we have

$P (|X -\mu| < k\sigma) \geq (1-\frac{1}{k^{2}})$

Here

$(1-\frac{1}{k^{2}})=0.75\\\\\Rightarrow \frac{1}{k^{2}}=0.25\\\\\Rightarrow k=\sqrt{\frac{1}{0.25}}\\\\\Rightarrow k=2$

Then we know that,

$|X - \mu| \geq k\sigma,\\\\ \Rightarrow \mu - k\sigma \leq X \leq \mu + k\sigma$ .

Here it is given that mean (µ) = 36 and standard deviation (σ) = 5.4.

Compute the two values between which at least 75% of the contestants lie as follows:

$P(\mu - k\sigma \leq X \leq \mu + k\sigma)=0.75\\\\P(36 - 2\cdot\ 5.4 \leq X \leq 36 + 2\cdot\ 5.4)=0.75\\\\P(25.2\leq X\leq 46.8)=0.75$

Thus, the two numbers of rolls are 25.2 and 46.8.

8 0

3 years ago

28. How much plain yogurt will you need to make 2 1/2 dozen cookies? Show your work.

xxMikexx [17]

Answer:

$\frac{5}{6}$ cups

Step-by-step explanation:

Normally, when working with mixed numbers, I would prefer to turn them into improper fractions first before evaluating.

1 $\frac{1}{2}$ cookies --- $\frac{1}{2}$ cup plain yogurt

$\frac{3}{2}$ cookies --- $\frac{1}{2}$ cup plain yogurt

2 $\frac{1}{2}$ cookies --- ? cup plain yogurt

$\frac{5}{2}$ cookies --- $\frac{5}{3}$ × $\frac{1}{2}$ cup plain yogurt = $\frac{5}{6}$ cups plain yogurt

5 0

3 years ago