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ValentinkaMS [17]
3 years ago
11

Traveling with a speed of 70 mph, a car covered a distance D miles in T hours. Write an equation that relates the distance D thi

s car travels in T hours. Use the equation to find the distance the car travels between 3:30 p.m. and 5:00 p.m.
Mathematics
1 answer:
pishuonlain [190]3 years ago
7 0
Just use the dirt method... Rate times time equals distance... Ok so it is traveling at a speed of 70 mph so that would be the rate (the speed). At first you don't know the distance but then it tells you in the end. So how many hours and minutes is it to get from 3:30 to 5:00? 2 hours and 30 minutes... So you just found the time. Then you times the rate/speed by the time and their you go! You get the distance!
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If $55 is put in an account that gets 6% and I add $20 at the end of each year, how much will I have at the end of 10 years?
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100+6=106% = 1.06
55x1.06^10= 98.50
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$258.50
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A random sample of 25 fields of rye has a mean yield of 31.2 bushels per acre and standard deviation of 6.99 bushels per acre. D
Murrr4er [49]

Answer:

Critical value is 1.318 and the confidence interval is 29.357 to  33.042

Step-by-step explanation:

n = 25

x = 31.2

s = 6.99

Degree of freedom = n-1= 25-1 =24

Confidence level = 0.8

So, α = 1- 0.8= 0.2

t critical = t_{\frac{\alpha}{2},df}=t_{\frac{0.2}{2},24}=t_{0.10,24}=1.318

Formula of confidence interval : \bar{x}-t_{\frac{\alpha}{2},df} \times \frac{s}{\sqrt{n}} to  \bar{x}+t_{\frac{\alpha}{2},df} \times \frac{s}{\sqrt{n}}

Confidence interval : 31.2-1.318 \times \frac{6.99}{\sqrt{25}} to  31.2+1.318 \times \frac{6.99}{\sqrt{25}}

Confidence interval : 29.357 to  33.042

Hence critical value is 1.318 and the confidence interval is 29.357 to  33.042

3 0
3 years ago
D +23 equals 40 evaluate
Paha777 [63]

Answer:

D=17

Step-by-step explanation:

D+23=40

D+23-23=40-23

D=17

3 0
3 years ago
please help!!!! 10 points!!!!! I’ve been trying to figure this out for 45 mins now and still haven’t been able to :(
7nadin3 [17]
What does this mean I’m confused
7 0
3 years ago
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