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4 years ago

I need help plz help

Mathematics

2 answers:

Zigmanuir [339]4 years ago

5 0

C. because the 2nd number is 5 or up. Which makes it round up

earnstyle [38]4 years ago

4 0

What is It being rounded to? The question is cut off. If its 200,000, it would be c because both and a b round to 300,000 and d rounds to 100,000.

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16. Reaction time tests can be used to assess an individual's hand-eye coordination. One test involves catching a 1 metre ruler

Rina8888 [55]

Answer:Reaction time tests can be used to assess an individual's hand-eye coordination. One test involves catching a 1 metre ruler and measuring the distance, d in metres, that the ruler travelled before being caught. The reaction time t seconds is then calculated using the formula: = √2d/9.8.

Step-by-step explanation:

6 0

3 years ago

In a math class with 29 students, a test was given the same day that an assignment was due. There were 22 students who passed th

Phoenix [80]

4/29 is the probability that a student who did not complete the homework passed the test.

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

It is given that,

There are 29 students in a math class.

Two types of students who passed the test and are not passed the test.

The other two types of students are who completed the assignment and did not complete the assignment.

So, the given data can be formed as a table.

There were 22 students who passed the test.
There were 20 students who completed the assignment.
There were 18 students who passed the test and also completed the assignment.

Passed the test Not passed the test Total

Completed assignment 18 - 20

Not completed assignment x - -

Total 22 - 29

Now, you need to find the probability that a student who did not complete the homework passed the test.

⇒ No.of students completed assignment passed the test / Total students.

<u>To find the no.of students completed assignment passed the test :</u>

Let 'x' is the no.of students completed assignment passed the test.

⇒ 18+x = 22

⇒ x = 22 - 18

⇒ x = 4

∴ P(students completed assignment passed the test) = 4 / 29.

4 0

3 years ago

Given csc(A) = 60/16 and that angle A is in Quadrant I, find the exact value of sec A in simplest radical form using a rational

fiasKO [112]

Answer:

$\frac{15 \sqrt{209} }{209}$

Step-by-step explanation:

Objective: Understand and work with trig identies.

Recall multiple trig identies and manipulate them to get from cosecant to secant.

Given

$\csc(a) = \frac{60}{16}$

Apply reciprocal identity csc a = 1/sin a.

$\sin(a) = \frac{16}{60}$

Apply pythagorean identity to find cos a.

$( \frac{16}{60}) {}^{2} + \cos(x) {}^{2} = 1$

$\frac{256}{3600} + \cos(x) {}^{2} = 1$

$\cos(x) {}^{2} = \frac{3600}{3600} - \frac{256}{3600}$

We can simplify both expression

$\cos(x) {}^{2} = \frac{225}{225} - \frac{16}{225}$

$\cos(x) = \frac{ \sqrt{209} }{15}$

Cosine is positve on quadrant 1 so that cos(a)

Apply reciprocal identity sec a= 1/ cos a.

The answer is

$\sec(a) = \frac{15}{ \sqrt{209} }$

Rationalize the denominator.

$\frac{15}{ \sqrt{209} } \times \frac{ \sqrt{209} }{ \sqrt{209} } = \frac{15 \sqrt{209} }{209}$

3 0

3 years ago

4.7x4.7x4.7 thats about it

Pavel [41]

Answer:

103.823

Step-by-step explanation:

It's just 4.7 to the third power, so I multiplied to get 103.823. :)

6 0

3 years ago

Complete the table.

Brilliant_brown [7]

Answer:

I believe the answer is 65%

Step-by-step explanation:

95/65%=61.75

5 0

4 years ago