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olganol [36]
3 years ago
8

The speed of an object in space is shown in the graph.

Mathematics
1 answer:
Arlecino [84]3 years ago
6 0

Answer:

B

Step-by-step explanation:

To find the slope, find the vertical distance and the horizontal distance between the points. Then write the distances as a ratio.

6 - 3 = 3

0.4 - 0.2 = 0.2

The slope is 3/0.2 = 15.

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If ax + x^2 = y^2 -at , what is the value or x and y?
alexandr1967 [171]

Answer:

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3 0
3 years ago
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Serhud [2]

Answer:

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8 0
2 years ago
A nurse at a local hospital is interested in estimating the birth weight of infants. how large a sample must she select if she d
enyata [817]
For large sample confidence intervals about the mean you have: 

xBar ± z * sx / sqrt(n) 

where xBar is the sample mean z is the zscore for having α% of the data in the tails, i.e., P( |Z| > z) = α sx is the sample standard deviation n is the sample size
 
We need only to concern ourselves with the error term of the CI, In order to find the sample size needed for a confidence interval of a given size.

z * sx / sqrt(n) = width. 

so the z-score for the confidence interval of .98 is the value of z such that 0.01 is in each tail of the distribution. z = 2.326348 

The equation we need to solve is:
z * sx / sqrt(n) = width 
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n = ( 2.326348 * 6 / 3 ) ^ 2 
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Since n must be integer valued we need to take the ceiling of this solution.
n = 22 
7 0
3 years ago
A store is having a sale. You want a pair of jeans that are $90 and a shirt for $50. They are both on sale for 40% off. The tax
gavmur [86]

Answer: 59.92

Step-by-step explanation:

90 + 50 = 140

140 - 40% = 56

56 + 7% = 59.92

6 0
3 years ago
F(x)= 2/3x -6 what is the value of f(-9)
STALIN [3.7K]

f(-9) means x is -9

Replace x with -9 and solve:

2/3(-9) - 6

Simplify:

-6 - 6 = -12

f(-9) = -12

3 0
3 years ago
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