PLEAS EHURRY!! It’s pre-calc!!
PIECE WISE FUNCTIONS!!
Answers
Answer: 60mph
Step-by-step explanation:
For each piece of our piecewise function, we have a different range for t, so we only use the expression that has a range that our t falls into. In the first, the range is 0 ≤ t ≤ 15, so the first expression ONLY WORKS for values of t that fit in this range (13, for example). In the third, the range is 240 ≤ t ≤ 250, so the third expression ONLY WORKS for values of t from 240 to 250 (242, for example). Our t does not fit in these ranges, so we do not use the first or third expression to find our answer.
In the second, the range is 15 < t < 240, so the second expression ONLY WORKS for values that are between 15 and 240, and our t is 18, so we use the second expression to find our answer. Our expression is just 60, so our final answer is at 18 seconds, the vehicle is going 60mph.
I hope this helps! :)
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A physical fitness association is including the mile run in its secondary- school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 440 seconds and a standard deviation of 50 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 325 seconds.
Answers
slope = (4 - 0) / (1 - 0) = 4/1 = 4
y = mx + b
slope(m) = 4
(1,4)...x = 1 and y = 4
now sub and find b, the y int
4 = 4(1) + b
4 = 4 + b
4 - 4 = b
0 = b
ur equation is : y = 4x + 0 or just y = 4x
Answers
Change the percentage into a decimal by dividing over 100:
12 / 100 = 0.12
Multiply:
0.12 × 120 = 14.4
Answer:
Answers
The quotient after the long division of the number 37 by 158 gives the number 0.234177....
Given a division problem.
Dividend is 37 and the divisor is 158.
We have to divide these to numbers.
Since dividend is less than the divisor, we have to make it greater or equal by adding zeroes to dividend and consequently there will be decimal point and zeroes in quotient.
Adding one zero, dividend becomes 370.
And the first digit of the quotient will be of the form 0., which 0 followed by a decimal point.
370 = (158 × 2) + 54
Next digit of the quotient becomes 2. so the quotient till now becomes 0.2.
Remainder is 54.
Adding a 0,
540 = (158 × 3) + 66
The quotient becomes 0.23.
Remainder is 66.
Adding again 0,
660 = (158 × 4) + 28
Quotient becomes 0.234.
This goes on like this,
When we do it again and again, we will get quotient as 0.234177...
Learn more about Division here :
#SPJ6
Answers
xmiles=13.2gallons
easy, multiply the first equaiton by 13.2 to get the galons to match
21.75*13.2=287.1 miles=13.2 gallons
answer is 287.1 miles
Answers
m=4
Mark has 4 marbles.
7 girls. What is the
probability of randomly
selecting a boy?
Answers
binomial(16 + 7, 16) 2^(-(16 + 7)) = ((16 + 7)!)/(16! 7! 2^(16 + 7)) = 245157/8388608 ≈ 0.02922 ≈ 1/34.22
(assuming children are independent and male and female are equally likely)
| probability
less than 16 boys | 0.9534
16 or less boys | 0.9827
more than 16 boys | 0.01734
16 or more boys | 0.04657
fraction of boys | 16/(16 + 7) ≈ 0.695652
fraction of girls | 7/(16 + 7) ≈ 0.304348
expected value | 11.5
standard deviation | 2.398
variance | 5.75
11.5