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katovenus [111]
3 years ago
10

What is -8.9 x 1.4 = equal to

Mathematics
2 answers:
Leto [7]3 years ago
5 0

Answer: -12.46

Step-by-step explanation:

You just do 8.9 * 1.4 then add the negative sign

STALIN [3.7K]3 years ago
3 0

Answer:

answer is -8.9*1.4 = -12.46

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A group of 50 New York psychology students got a mean score of 530 on the psychology GRE with a standard deviation of 80. These
lesantik [10]

Answer: No, New York students are not truly more nerdy than the California students.

Step-by-step explanation:

Since we have given that

Number of students in a group = 50

Mean score of New York psychology = 530

Mean score of California psychology = 515

Standard deviation = 80

So, we will find t-distribution first.

t=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\t=\dfrac{530-515}{\dfrac{80}{\sqrt{50}}}\\\\t=1.32

Let α = 5% = 0.05

So, t_{\alpha,2}=2.920

Since t < t(critical value)

No, New York students are not truly more nerdy than the California students.

3 0
3 years ago
The ratio of boys to girls in Math class is 3:4. If there are 21 total students in class, how many more girls are in the class t
sergij07 [2.7K]
There should be 3 more girls than boys in the class (9 boys, 12 girls)
8 0
3 years ago
Read 2 more answers
Sara bought 4 pounds
Roman55 [17]

Answer:

$12.80

Step-by-step explanation:

Sara bought 4 pounds of coffee.

Each pound (lb) costs $3.20

To find the total cost, multiply the cost per pound ($3.20) with the amount of pounds Sara is going to buy (4):

4 x 3.20 = $12.80

$12.80 would be the total cost before tax.

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3 0
3 years ago
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A ball is thrown into the air. The height in feet of the ball can be modeled by the equation, h(t) = −16t2 + 10t + 6 where t is
Lelechka [254]

A function assigns the value of each element of one set to the other specific element of another set. The correct option is D.

<h3>What is a Function?</h3>

A function assigns the value of each element of one set to the other specific element of another set.

The time at which the ball will hit the ground is,

h(t) = −16t² + 10t + 6

0 = -16t² + 10t + 6

8t² - 8t + 3t - 3= 0

8t(t-1)+3(t-1) = 0

(8t+3)(t-1)=0

t = -0.375, 1

Hence, the ball hit the ground at 1 second, while the function in intercept form can be written as h(t) = (−8t − 3)(2t − 2).

Thus, the correct option is D.

Learn more about Function:

brainly.com/question/5245372

#SPJ1

6 0
2 years ago
Help !!! 50 points for the right answer!!!!
mart [117]
It doesn't give any answers? I think the first one is 14 the second one is -4 and the third one is 10
5 0
3 years ago
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