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3 years ago

Which of the following expressions could you use to estimate 47% of 89?

Mathematics

2 answers:

bixtya [17]3 years ago

5 0

Answer:

0.47 · 89

Step-by-step explanation:

47% is 0.47

Orlov [11]3 years ago

4 0

Answer:

The last choice

Step-by-step explanation:

0.47 times 89

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A phone company offers two monthly plans. Plan A costs $8 plus an additional $0.09 for each minute of calls. plan B cost $16 plu

harina [27]

Answer: 72

Plan A = 30 +0.15x

Plan B = 16 +0.20x

30+0.15x = 16+0.20x

subtract 16 from each side

14 +0.15x = 0.20x

subtract 0.15x from each side

14=0.05x

x = 14/0.05 = 280 minutes

280*0.15 = 42 +30 = $72

280 * 0.20 = 56 +16 = 72

280 minutes and cost $72 each

Step-by-step explanation:

5 0

3 years ago

It seems like I can’t see the answers so if you commented, comment again! Thanks :)

just olya [345]

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$Angle \: \: 4 = 100°$

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8 0

3 years ago

If a Kindergarten or first grade child determines there are 23 sticks in a collection by counting,

balandron [24]

Answer:

You could show them by using different set of blocks for different placements.

such as a cetain type of block for the ones place, a different kind for the tens place.

You can color code it so that they could distinguish the different numbers.

4 0

3 years ago

ACME Manufacturing claims that its cell phone batteries last more than 32 hours on average in a certain type of cell phone. Test

son4ous [18]

Answer:

We can conclude that the battery life is greater than the 32 hour claim.

Step-by-step explanation:

The null hypothesis is:

$H_{0} = 32$

The alternate hypotesis is:

$H_{1} > 32$

Our test statistic is:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}$

In which X is the statistic, $\mu$ is the mean, $\sigma$ is the standard deviation and n is the size of the sample.

In this problem, we have that:

$X = 37.8, \mu = 32, \sigma = 10, n = 18$

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$t = \frac{37.8 - 32}{\frac{10}{\sqrt{18}}}$

$t = 2.46$

We need to find the probability of finding a mean time greater than 37.8. If it is 5% of smaller(alpha = 0.05.), we can conclude that the battery life is greater than the 32 hour claim.

Probability of finding a mean time greater than 37.8

1 subtracted by the pvalue of z = t = 2.46.

z = 2.46 has a pvalue of 0.9931

1 - 0.9931 = 0.0069 < 0.05

So we can conclude that the battery life is greater than the 32 hour claim.

5 0

3 years ago

Is this right? Or no?

kvv77 [185]

No if i was you i would go with the last one

6 0

3 years ago