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Katarina [22]
2 years ago
7

6 to the negative 4th power times 6 to the 7th power ​

Mathematics
1 answer:
umka21 [38]2 years ago
3 0

Answer:

216

Step-by-step explanation:

(6 to the -4th) * (6 to the 7th)

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Using polynomial regression fit a cubic equation to the following data: x 3 4 5 7 8 9 11 12 y 1.6 3.6 4.4 3.4 2.2 2.8 3.8 4.6 Pl
luda_lava [24]

Answer:

As problem is of regression analysis,thus r^2 will be 24 and sy/x is 4.

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3 years ago
Which of the following is the most important piece of information to consider when comparing prices?
nataly862011 [7]

<em>Answer: A) The average price of the two items you are comparing.</em>

<em>Step-by-step explanation:</em>

<em>Because...</em>

<em>When a person goes to a store they look at a item and then compare prices. So for every person price is the important thing that you are comparing. It also depends on your income as well.  So choice A and C is almost the same. </em>

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4 0
3 years ago
Use the graphs to estimate both solutions to x^2+x-4=0
Bogdan [553]

Answer:

No graph so we'll use the quadratic formula

x^2+x-4=0

a = 1

b = 1

c = -4

x = -1 +- sqr root (1^2 - 4 * 1 * -4) / 2

x = (-1 +- sqr root (1 +16) ) / 2

x1 = (-1 + sqr root (17)) / 2

x2 = (-1 - sqr root (17)) / 2

Step-by-step explanation:

4 0
3 years ago
The makers of a smartphone have received complaints that the face recognition tool often doesn't work, or takes multiple attempt
cupoosta [38]

Answer:

Step-by-step explanation:

This is a test of 2 population proportions. Let 1 and 2 be the subscript for the new version and the old version. The population proportion of the time that the tool works for the new and old version would be p1 and p2 respectively.

p1 - p2 = difference in the proportion of the times that the tool works for the new and old version

The null hypothesis is

H0 : p1 = p2

p1 - p2 = 0

The alternative hypothesis is

H1 : p1 > p2

p1 - p2 > 0

it is a right tailed test

Sample proportion = x/n

Where

x represents number of success

n represents number of samples

For new version

p1 = 70/100 = 0.7

n1 = 80

x1 = n1p1 = 80 × 0.7 = 56

For old version,

p2 = 56/100 = 0.56

n2 = 75

x2 = n2p2 = 75 × 0.56 = 42

The pooled proportion, pc is

pc = (x1 + x2)/(n1 + n2)

pc = (56 + 42)/(80 + 75) = 0.63

1 - pc = 1 - 0.63 = 0.37

z = (p1 - p2)/√pc(1 - pc)(1/n1 + 1/n2)

z = (0.7 - 0.56)/√(0.63)(0.37)(1/80 + 1/75) = 0.14/0.07759993557

z = 1.8

Since it is a right tailed test, we will look at the area to the right of the z score on the normal distribution table to determine the p value. Therefore,

p = 1 - 0.9641 = 0.04

By using the p value,

Since 0.1 > 0.04, we would reject the null hypothesis. Therefore, at a significance level of 0.1, it can be concluded that the new version is performing better.

7 0
3 years ago
Is 13.261 greater than 13.265 dont take my question dow
dmitriy555 [2]

Answer:

No

Step-by-step explanation:

13.261 ends with a 1 and 13.265 ends with a 5 and 5 is greater than 1.

7 0
3 years ago
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