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12345 [234]
3 years ago
7

Please help and explain your answer.

Mathematics
1 answer:
tankabanditka [31]3 years ago
6 0
C
8x-10=150
Add 10
8x=160
Divide by 8
X= 20
RZ is 8(20)-10= 160-10=150
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Andy is scuba diving. he starts at sea level and then descends 10 feet in 212 minutes. part a how would you represent andy's des
Mashcka [7]
I would use the starting position, sea level as zero. Then I would convert all those minutes to hours so the answer is an integer and not a decimal.
60 min * (-10 ft / 212 min) = -2.83 ft/hr

round to integer = -3 ft/hr
4 0
3 years ago
A $52 video game is advertised for 20% off.If sales tax is 6% how much will the video game cost​
Usimov [2.4K]

Answer:

S44.10

Step-by-step explanation:

20% of 52 is 41.6

6% of 41.6 is 2.49600 US$ which rounds to 2.50

2.50+41.6=44.1

$44.10

7 0
3 years ago
The budget for a remake of a movie is 100 times the budget of the original movie. The originals movie budget was 6•10^5 dollars.
Dmitry [639]

Answer:

600*10^{5}

Step-by-step explanation:

All you have to do is multiply the original cost of the movie by 100.

6 0
3 years ago
In order to help identify baby growth patterns that are unusual, we need to construct a confidence interval of the mean head cir
sukhopar [10]

Answer:

The 99% confidence interval estimate of the mean head circumference of all 2-month-old babies is (40.18cm, 41.02cm).

Step-by-step explanation:

Our sample size is 100.

The first step to solve this problem is finding our degrees of freedom, that is, the sample size subtracted by 1. So

df = 100-1 = 99.

Then, we need to subtract one by the confidence level \alpha and divide by 2. So:

\frac{1-\alpha}{2} = \frac{0.01}{2} = 0.005

Now, we need our answers from both steps above to find a value T in the t-distribution table. So, with 99 and 0.005 in the t-distribution table, we have T = 2.626

Now, we find the standard deviation of the sample. This is the division of the standard deviation by the square root of the sample size. So

s = \frac{1.6}{\sqrt{100}} = 0.16

Now, we multiply T and s

M = Ts = 2.626*0.16 = 0.42

For the lower end of the interval, we subtract the sample mean by M. So the lower end of the interval here is

L = 40.6 - 0.42 = 40.18cm

For the upper end of the interval, we add the sample mean and M. So the upper end of the interval here is

L = 40.6 + 0.42 = 41.02cm

So

The 99% confidence interval estimate of the mean head circumference of all 2-month-old babies is (40.18cm, 41.02cm).

3 0
3 years ago
*cough cough* I need help :D
Romashka-Z-Leto [24]

Step-by-step explanation:

*cough cough*

4 0
3 years ago
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