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3 years ago

Given the diagram below, what is cos 45

Mathematics

1 answer:

Mamont248 [21]3 years ago

5 0

Hey

Your answer is pretty simple

1/√2
Don't forget to mark Brainliest :^)

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What is the least common multiple of 9 and 8

leonid [27]

Answer:

72 is the least common multiple

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2 years ago

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Each week carrie works 40 hours she spend 15% of her time at register

VLD [36.1K]

Please, share the goal of the problem. If Carrie works 40 hours per week and spends 15% of her time at the register, how much time does she NOT spend at the register?

Subtract 15% from 100%; the result is 85%. Now find 85% of 40 hours:

0.85(40 hours) = 34 hours.

Please note that I invented part of this problem. Next time, share all of the info so that someone can help you solve YOUR particular problem.

3 0

3 years ago

A truck loaded with 8000 electronic circuit boards has just pulled into a firm’s receiving dock. The supplier claims that no mor

Juliette [100K]

Answer:

The 95% confidence interval for the proportion of all boards in this shipment that fall outside the specification is (1.8%, 6.2%).

Step-by-step explanation:

Let X = number of boards that fall outside the most rigid level of industry performance specifications.

In a random sample of 300 boards the number of defective boards was 12.

Compute the sample proportion of defective boards as follows:

$\hat p =\frac{12}{300}=0.04$

The (1 - α)% confidence interval for population proportion p is:

$CI=\hat p\pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}$

The critical value of z for 95% confidence level is,

$z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96$

*Use a z-table.

Compute the 95% confidence interval for the proportion of all boards in this shipment that fall outside the specification as follows:

$CI=\hat p\pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}\\=0.04\pm1.96\sqrt{\frac{0.04(1-0.04)}{300}}\\=0.04\pm0.022\\=(0.018, 0.062)\\\approx(1.8\%, 6.2\%)$

Thus, the 95% confidence interval for the proportion of all boards in this shipment that fall outside the specification is (1.8%, 6.2%).

3 0

2 years ago

8x^2+23=823 whats going to be the answer I got 0 am I right?

Naily [24]

1) No; you are incorrect. "0" is NOT a solution.

Plug in "0" for "x" ;

8*0² + 23 =? 823? ;

8*0 + 23 =? 823? ;

0 + 23 = ? 823 ? ; No! ; "0 + 23 = 23 " ; NOT "823" .
_________________________________________________
2) The answers: x = 10, -10 ; or, write as: x = ± 10 .
_________________________________________________

To solve:

GIven: 8x² + 23 = 823 ;

Subtract "23" from EACH SIDE of the equation:
_____________________________________________
8x² + 23 - 23 = 823 - 23 ;
to get:
8x² = 800 ;

Now, divide EACH SIDE of the equation by "8" ;

8x² / 8 = 800 / 8 ;

to get: x² = 100 ;

Take the "square root" of EACH SIDE of the equation; to isolate "x" on one side of the equation; and to solve for "x" ;

√(x²) = √(100) ;

x = ± 10 .

The answers: x = 10, -10 ; or, write as: x = ± 10 .
_____________________________________________________

5 0

3 years ago

When 3 is subtracted from one third of a number n, the result is less than 6. Which inequality and solution represent this situa

MArishka [77]

Answer:

1/3n-3÷6

Step-by-step explanation:

3 is subtraced form 1/3

3 0

2 years ago

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