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2 years ago

PLEASE HELP ME!

Mathematics

1 answer:

cestrela7 [59]2 years ago

4 0

Answer:

1) 45 minutes

2) they meet in 20 minutes

3) (12-6)/(20/60)=18kmh

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Luke’s Bakery recently spent a total of $69 on new equipment, and their average hourly operating costs are $15. Their average ho

Ann [662]

Answer:

Step-by-step explanation:

69 + 15h = 39h

69 = 39h - 15h

69 = 24h

69/24 = h

2.875 hrs <======

69 + 15(2.875) = 39(2.875)

69 + 43.125 = 112.125

$ 112.125 = $ 112.125 <====

I didn't round anything.

3 0

3 years ago

7- square root of 3i

r-ruslan [8.4K]

Step-by-step explanation:

Any complex number is of the form: $a + bi$ where a is real part and B is imaginary part.

Therefore, in given complex number: $7- \sqrt {3}i$

7 is real part.

$\sqrt {3}$ is imaginary part.

Hence, first two options are correct.

Last two options are incorrect because of the following reasons:

$- \sqrt {3}$ is coefficient of $i$ & not $7- \sqrt {3}$

Given number is a difference of a real number and imaginary number & not a sum of a real number and imaginary number.

5 0

3 years ago

Read 2 more answers

-13 =\dfrac r9+8−13= <br> 9<br> r<br> <br> +8

inna [77]

Answer:

Ello, estoy aquí para ayudar, pero hablo español, con suerte, entenderás que lo estoy intentando.

56738w7421098548091672949123749279102

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

You decide to deposit $5,000 in a savings account that earns 3% interest. How much money will you have in 10 years

ki77a [65]

Answer:

65,000

Step-by-step explanation:

7 0

2 years ago

stat: sample of 780 adults in the U.S.A., it was found that 80 of those had a pinworm infestation. You want to find the 99% conf

Anettt [7]

Answer: 554

Step-by-step explanation:

If prior population proportion is known, then the formula to find the sample size is given by :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

As per given description, we have

p= 0.1

E=0.025

Critical z-value for 95% confidence : $z_{\alpha/2}=1.96$

Then,

$n=0.1(1-0.1)(\dfrac{1.96}{0.025})^2=553.1904\approx554$

Hence, the minimum sample size required = 554.

7 0

3 years ago