A number plus the sum of the number<br> and seven.

A farmer paid $500 per month for deliveries over 10 months. For the other 2 months of the year, he paid $600 per

kati45 [8]

Answer:

500(10) + 600(2)

Step-by-step explanation:

5 0

2 years ago

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Which of the following is a terminating decimal? A.10.3 never ending B.10 with the check mark C. 10.101 D.100.6 never ending

kirill [66]

C; terminating means it stops at a definite point
a is a repeating decimal, for b i think you mean radical of 10 and that’s irrational, and d is repeating

7 0

3 years ago

The number of popcorns sold at a movie theatre was 8 less than three times the number hotdogs. How many hotdogs did the theatre

serg [7]

Answer:

200

Step-by-step explanation:

If the theater sold 8 more popcorns, the total would be 600, and it would be exactly 3 times the number of hotdogs. The theater sold 1/3 of 600, or 200 hotdogs.

6 0

3 years ago

You are scuba diving at

devlian [24]

Answer:

-10

Step-by-step explanation:

-8 feet minus 2 feet would equal -10 feet. It helps to think of it as a negative number instead, so it would be -8 ft + (-2) ft = -10 feet. Hope this helps!!

3 0

3 years ago

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5. A scientist believes the concentration of radon gas in the air is greater that the established safe level of 4pci or less. Th

zysi [14]

Complete Question

A scientist believes the concentration of radon gas in the air is greater that the established safe level of 4 pci or less. The scientist tests the composition for 36 days finding an average concentration of 4.4 pci with a sample standard deviation of 1 pci.

a) In testing the scientist's belief, write the appropriate hypotheses:

$H_o:$ Ha:

b) What decision should be made?

Answer:

a

The null hypothesis is $H_o : \mu \le 4 \ pci$

The alternative hypothesis is $H_a : \mu > 4 \ pci$

b

There is sufficient evidence to conclude that the concentration of radon gas in the air is greater that the established safe level of 4pci or less

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 4 \ pci$

The sample size $n = 36 \ days$

The sample mean is $\= x = 4.4 \ pci$

The standard deviation is $\sigma = 1 \ pci$

The level of significance is $\alpha = 0.05$

The null hypothesis is $H_o : \mu = 4 \ pci$

The alternative hypothesis is $H_a : \mu > 4 \ pci$

Generally the test statistics is mathematically represented as

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

=> $t = \frac{ 4.4 - 4 }{ \frac{ 1}{ \sqrt{36} } }$

=> $t =2.4$

The p-value is mathematically represented as

$p-value = P(Z > 2.4 )$

From the z-table

$P(Z > 2.4 ) = 0.008$

$p-value =0.008$

So from this obtained value we see that

$p-value < \alpha$ so we reject the null hypothesis

Hence we can conclude that there is sufficient evidence to conclude that the concentration of radon gas in the air is greater that the established safe level of 4pci or less

4 0

3 years ago

A number plus the sum of the number and seven.