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Licemer1 [7]
3 years ago
12

An object is projected vertically upwards from ground level. When asked a question about its maximum height, you should use: A)

S=0 B) U=0 C) V=0 D) A=0
Mathematics
1 answer:
denis-greek [22]3 years ago
8 0

Answer:

V = 0

Step-by-step explanation:

Given

At maximum height

Required

Select which of the options is true

At the maximum height of an upward projectile, the final velocity (v) is always equal to 0.

i.e.

V = 0

Other parameters such as initial velocity (u), acceleration (a or g) are not 0.

Hence:

(c) answers the question

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Suppose that y varies inversely with x. Use the information to find k, and then choose the equation of variation. x = 13 when y
earnstyle [38]

To solve this problem you must apply the proccedure shown below:

1. You have that y varies inversely with x and when x=13 the value of y is y=100.

2. Therefore, you can write the following expression, where k is the constant of proportionality:

y=\frac{k}{x}

3. Solve for the constant of proportionality and substitute the values to calculate it:

k=yx\\ k=(100)(13=\\ k=1300

4. The equation is:

y=\frac{1300}{x}

The answer is: k=1300\\ y=\frac{1300}{x}

6 0
3 years ago
As a maintenance electrician, it takes you 40 minutes to rewire a motor. You have 6 motors to rewire.
bazaltina [42]

Answer:

The maintenance electrician takes 287.555555566667 hours to to rewire all the motors

Step-by-step explanation:

1. Calculate all of the minutes for all the numbers.

It takes you 26.6666667 minutes to rewire 2/3 of a motor.

It takes you 160 minutes to rewire 4 motors.

It takes you 266.666667 to rewire 6 2/3 motors

It takes you 7,200 minutes to rewire 180 motors

It takes you 9,600 minutes to rewire 240 motors

2. Add all of the minutes together.

26.666667 + 160 + 266.666667 + 7,200 + 9,600 = 17253.333334

It takes you 17253.333334 minutes to rewire 431.333333 motors

3. Convert minutes to hours

17253.333334/60 = 287.555555566667

It takes you 287.555555566667 hours to rewire all the motors

7 0
4 years ago
In an indoor soccer stadium, there are 20 seats in the first row and 31 seats in the second row. Every
Finger [1]
<h3>________________________________________________</h3>

Step-by-step Solution for Part-a:

<u>We know that:</u>

  • Row-1: 20 seats
  • Row-2: 20 + 11
  • Row-x: 20 + (11x - 11)

Since the number of rows in rows x is 20 + (11x - 11), the formula to calculate the number of seats in each row is 20 + (11x - 11).

<h3>________________________________________________</h3>

Step-by-step Solution for Part-b:

<u>We know that:</u>

  • y rows = 174 seats
  • Obtained rule from part-a: 20 + (11y - 11)

<u>Solution:</u>

  • 20 + (11y - 11) = 174 rows
  • => 20 + 11y - 11 = 174 rows
  • => 9 + 11y = 174 rows
  • => 11y = 174 - 9 rows
  • => 11y = 165
  • => y = 165/11
  • => y = 15

Hence, the row which has 174 seats is row 15.

<h3>________________________________________________</h3>
5 0
2 years ago
Solve 4 by 216 raise to minus 2 by 3 + 1 by 256 raise to 3 by 4 + 2 by 243 raise to 1 by 5​
olchik [2.2K]

Answer:

214....

Step-by-step explanation:

If the question is : solve 4 by 216 raise to minus 2 by 3 + 1 by 256 raise to minus 3 by 4 + 2 by 243 raise to minus 1 by 5​

The given expression can be written as:

4/(216)-2/3+1/(256)-3/4+2/(243)-1/5

This expression has three terms.

Notice that the exponents are negative:

We will change the division into multiplication so that the exponents will become positive;

4*(216)^2/3+ 1*(256)^3/4+ 2*(243)^1/5

If we multiply 6 three times it will give us 6^3=6*6*6=216

If we multiply 4 four  times it will give us 4^4=4*4*4*4=256

If we multiply 3 five times it will give us 3^5=3*3*3*3*3=243

So we will write it as:

=4*(6^3)^2/3+ 1(4^4)3/4 +2(3^5)^1/5

=4(6)^2+(4)^3+2(3)

=4*36+64+6

=144+64+6

=214

The answer is 214....

7 0
3 years ago
What is 4/9 times 1/8
Marysya12 [62]
4/9 times 1/8 is 0.055
5 0
3 years ago
Read 2 more answers
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