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olga2289 [7]
3 years ago
14

PLEASE HELP! PLEASE HELP! PLEASE HELP! PLEASE HELP! PLEASE HELP! PLEASE HELP! PLEASE HELP! PLEASE HELP! PLEASE HELP! PLEASE HELP

! PLEASE HELP! PLEASE HELP! PLEASE HELP! PLEASE HELP! PLEASE HELP! PLEASE HELP! PLEASE HELP!

Mathematics
2 answers:
weqwewe [10]3 years ago
8 0

Answer:

Part B: 105

Step-by-step explanation:

15

15x2 =30

30x2 =60

60x2 =120

120x2 =240

240x2 =480

480x2 =960

960/60 =16 hours

I hope I helped!

kondaur [170]3 years ago
5 0

Answer: 1230

Step-by-step explanation: 22 hours that's how much she will be studying in total till the seventh day

and 105 mins till the seventh day

so she will be studying 1230 in total so put 1230 at the blank

1230 is your answer

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Write an equation of the line passing through the point (2,8) that is perpendicular to the line 2x-3y=7
labwork [276]

Answer:

y = (-3/2x) + (35/4)

Step-by-step explanation:

So the perpendicular line will have a slope that is the opposite reciprocal of the other line's slope. Solve for the original line's slope first:

2x - 3y = 7 --> -3y = -2x + 7 --> y = (2x/3) - (7/3)

So, the slope of the perpendicular line will be (-3/2x)

Solve for the y-intercept of the perpendicular like by using the linear equation and substituting in (2,8):

8 = (-3/(2*2)) + b --> (32/4) = -(3/4) + b --> b = (35/4)

So, y = (-3/2x) + (35/4)

Hope that helps! :D

4 0
3 years ago
Help please on all of these
ollegr [7]

the answer is on the picture

6 0
3 years ago
Mrs. Rogers sold 48 out of 80 crafts at the fair. What percent of her crafts did she sell? ~Plz answer like ASAP!!thank you :))
Gre4nikov [31]

Answer:

38.4

38.4 is 48% of 80

Step-by-step explanation:

What is 48% of 80?

Y is 48% of 80

Equation: Y = P% * X

Solving our equation for Y

Y = P% * X

Y = 48% * 80

Converting percent to decimal:

p = 48%/100 = 0.48

Y = 0.48 * 80

Y = 38.4

4 0
3 years ago
A hummingbird can flap its wings an average of 1800 times every 30 seconds. What is the rate change of wing flaps?
Debora [2.8K]

Answer:

60?

Step-by-step explanation:

I just divided 1800/30= 60

3 0
3 years ago
In a prior sample of U.S. adults, the Center for Disease Control (CDC), found that 8% of the people in this sample had pinworm b
kow [346]

Answer: a) 453  b) 1537

Step-by-step explanation:

As per given , we have

Margin of error : E= 0.025

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

a) The prior estimate of population proportion : p=0.08

Required sample size :-

n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.08(1-0.08)(\dfrac{1.96}{0.025})^2\\\\=452.386816\approx453

The minimum sample size is 453 U.S. adults.

b) Since the prior estimate of population proportion is not available , so we take p= 0.5

Required sample size :-

n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.96}{0.025})^2\\\\=1536.64\approx1537

The minimum sample size is 1537 U.S. adults.

5 0
4 years ago
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