1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
spayn [35]
3 years ago
7

A student ran the 100-m dash in 15.4 s. What was the student’s speed in miles per hour?

Mathematics
2 answers:
Marina CMI [18]3 years ago
5 0

Answer:

Speed of the student was 14.51 miles per hour.

Step-by-step explanation:

A student ran the dash = 100 m

Since 1 meter = 0.000621 miles

Therefore, 100 meter = 100× 0.000621

                                   = 0.0621 miles

He ran the dash in 15.4 seconds

∵ 3600 seconds = 1 hour

∴1 second = \frac{1}{3600} hour

∴ 15.4 seconds = \frac{15.4}{3600} hour

                         = 0.00428 hours

Now we know the formula to calculate the speed

Speed = \frac{\text{Disatance}}{\text{Time}}

           = \frac{0.0621}{0.00428} miles per hour

           = 14.51 miles per hour

Speed of the student was 14.51 miles per hour.

vredina [299]3 years ago
4 0
15.4 seconds = 0.00428 hours and 100 meters = 0.062 miles soo the student ran approximately 14.5 mph
You might be interested in
What is the value of x?<br>log 3x =4<br> A. 7 B. 27 C. 81 D. 12
8_murik_8 [283]
The value of X is

X= 4/3
5 0
2 years ago
Read 2 more answers
Absolute value of -392
Tema [17]

Answer:392

i need help plz help and here is a explanation i hope this helped

step-by-step :

Formally, the absolute value of a number is the distance between the number and the origin. This is a much more powerful definition than the "makes a negative number positive" idea. It connects the notion of absolute value to the absolute value of a complex number and the magnitude of a vector.

The absolute value of x, denoted "| x |" (and which is read as "the absolute value of x"), is the distance of x from zero. This is why absolute value is never negative; absolute value only asks "how far?", not "in which direction?" This means not only that | 3 | = 3, because 3 is three units to the right of zero, but also that | –3 | = 3, because –3 is three units to the left of zero. You can see this on the following number line:

abs(-3) = abs(3) = 3

Warning: The absolute-value notation is bars, not parentheses or brackets. Use the proper notation; the other notations do not mean the same thing.

It is important to note that the absolute value bars do NOT work in the same way as do parentheses. Whereas –(–3) = +3, this is NOT how it works for absolute value:

Simplify –| –3 |.

Given –| –3 |, I first need to handle the absolute-value part, taking the positive of the insides (the "argument of" the absolute value) and then converting the absolute value bars to parentheses:

–| –3 | = –(+3)

Now I can take the negative through the parentheses:

–| –3 | = –(3) = –3

As this illustrates, if you take the negative of an absolute value (that is, if you have a "minus" sign in front of the absolute-value bars), you will get a negative number for your answer.

Side note: When typing math as text, such as in an e-mail, the "pipe" character is usually used to indicate absolute values. The "pipe" is probably a shift-key somewhere north of the "Enter" key on your keyboard. While the "pipe" denoted on the physical keyboard key may look like a "broken" line, the typed character should display on your screen as a solid vertical bar. If you cannot locate a "pipe" character, you can use the "abs()" notation instead, so that "the absolute value of negative 3" would be typed as "abs(–3)".

Here are some more example simplifications:

Simplify | –8 |.

| –8 | = 8

Simplify | 0 – 6 |.

| 0 – 6 | = | –6 | = 6

Simplify | 5 – 2 |.

| 5 – 2 | = | 3 | = 3

Simplify | 2 – 5 |.

| 2 – 5 | = | –3 | = 3

Simplify | 0(–4) |.

| 0(–4) | = | 0 | = 0

Why is the absolute value of zero equal to "0"? Ask yourself: How far is zero from 0? Zero units, right? So | 0 | = 0.

Simplify | 2 + 3(–4) |.

| 2 + 3(–4) | = | 2 – 12 | = | –10 | = 10

Simplify –| –4 |.

–| –4| = –(4) = –4

In the next three examples, pay particular attention to the difference that the location of the square makes, with respect to the "minus" signs.

Simplify –| (–2)2 |.

–| (–2)2 | = –| 4 | = –4

Simplify –| –2 |2

–| –2 |2 = –(2)2 = –(4) = –4

Simplify (–| –2 |)2.

(–| –2 |)2 = (–(2))2 = (–2)2 = 4

5 0
3 years ago
Merry Soy, married, earns a weekly salary of $830 and claims one withholding allowance. By the percentage method, how much incom
xxMikexx [17]
You need to find the amount subject to withholding, subtracting from the weekly salary the amount for one withholding allowance for weekly salaries, which is 77.90$:

830 - 77.90 = 752.1 $.

Then, look in the Fed Tax tables (
http://www.opers.ok.gov/Websites/opers/images/pdfs/2016-Fed-Tax-Tables.pdf ) for a married person with a weekly payroll.

You previously found an amount of  752.1 which is greater than 521 but less than 1613$: therefore the income tax to withhold is 35.70$ + 15% of excess over $521.

Therefore, calculate the income tax due: 35.70 + (752.1 - 521) × 15 ÷ 100 = 70.37$

The total amount of income tax that will be withheld is 70.37$
4 0
3 years ago
You will need 120 feet of fencing to put all the way around a rectangular garden. The length of the garden is 40 feet. What is t
GREYUIT [131]

Answer:

A. 20 ft

Step-by-step explanation:

(120/2)-40=20

3 0
3 years ago
Read 2 more answers
ALG II NEED HELP QUICK! Will mark the brainliest answer
lbvjy [14]
I think it’s the second one because The formula would be
x=
2a
−b±
b
2
−4ac
4 0
3 years ago
Other questions:
  • Please help!!! Don't understand how to solve
    9·1 answer
  • Need Help Fast!!!!!!!!!!!!!!!!!!
    12·1 answer
  • If you drive from New York to Dallas and then from Dallas to Chicago, how many miles would you drive?
    12·2 answers
  • You earn $250 per month from your part-time job. You are in a kayaking club that costs $20 per month, and you save at least $100
    15·1 answer
  • You start driving north for 48 miles, turn right, and drive east for another 14 miles. At the end of driving, what is your strai
    15·2 answers
  • Name the place value to which each number was round 4.805 to 4.8
    7·1 answer
  • Andy is alone in the wilderness and eager to get back to camp. Looking at his map
    15·2 answers
  • Please help its due in a hour
    8·1 answer
  • I need the answer. Plzzzzzz
    11·2 answers
  • Solve for the value of N.<br> PLEASE SOMEONE HELP ME ILL GIVE YOU POINTS AND BRAINLIST ANSWER!!
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!