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
aev [14]
2 years ago
15

a sprinter increases the speed from 0 meters per second to 9 meters per second in 2 seconds. what is the acceleration

Mathematics
1 answer:
mote1985 [20]2 years ago
4 0

Answer:

The acceleration is

4.5 {ms}^{ - 2}

Step-by-step explanation:

Use the equation of motion,

v = u + at

where u=0m/s is the initial speed, v=9m/s is the final speed and t=2 seconds is the time.

We substitute the values into the equation and solve for the acceleration, a

9 = 0 + a(2)

This means that;

9 = 2a

Divide both sides by 2 to get:

a =  \frac{9}{2}

a = 4.5 {ms}^{ - 2}

You might be interested in
Solve 4x + 11 = k for x.
steposvetlana [31]

Answer:

Step-by-step explanation:

Simplifying

4x + 11 = k

Reorder the terms:

11 + 4x = k

Solving

11 + 4x = k

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-11' to each side of the equation.

11 + -11 + 4x = -11 + k

Combine like terms: 11 + -11 = 0

0 + 4x = -11 + k

4x = -11 + k

Divide each side by '4'.

x = -2.75 + 0.25k

Simplifying

x = -2.75 + 0.25k

4 0
3 years ago
The cost for 50 pounds of pet food is $117.50. What is the cost for on pound of food?
lisov135 [29]

The cost per pound is

... $117.50/(50 pounds) = $2.35/pound

The average cost for a pound of pet food is $2.35.

_____

If the food only comes in 50 lb bags, your cost for one pound of it will be $117.50.

5 0
2 years ago
The area of the sector formed by the 110 degree central angle is 50 units squared. What is the circumference of the circle
Mama L [17]

Answer:

The circumference of the circle is C=45.346 \:units.

Step-by-step explanation:

A sector is the part of a circle enclosed by two radii of a circle and their intercepted arc. A pie-shaped part of a circle.

The area of a circle is given by A_{circle}=\pi r^2

The formula used to calculate the area of a sector of a circle is:

A_{sector}=\frac{central \:angle}{360} \cdot {Area \:of \:whole \:circle}\\\\A_{sector}=\frac{\theta}{360} \cdot \pi r^2

The circumference of a circle is the distance around the outside of the circle and its given by

C=2\pi r

We know the central angle \theta = 110º and the area of the sector 50 units squared.

First, we use the formula to calculate the area of a sector to find the radius.

50=\frac{110}{360} \cdot \pi r^2\\\\\frac{110}{360}\pi r^2=50\\\\\frac{11\pi }{36}r^2=50\\\\11\pi r^2=1800\\\\r^2=\frac{1800}{11\pi }\\\\\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}\\\\r=\sqrt{\frac{1800}{11\pi }},\:r=-\sqrt{\frac{1800}{11\pi }}

The radius can't be negative. Therefore,

r=\sqrt{\frac{1800}{11\pi }}\approx 7.217 \:units

Next, we apply the formula for the circumference of a circle.

C=2\pi (7.217)=45.346 \:units

7 0
3 years ago
What is the product of (1.9*10^-3)(2*10^4)
RoseWind [281]

Answer:

to solve use the distributive property and multiply

Step-by-step explanation:

I'm sorry I do not have the product

4 0
3 years ago
Read 2 more answers
WILL GIVE BRAINLIEST! GIVING 10 POINTS!!!!
34kurt
<span><span>DO use multiplication sign '*' (the STAR) symbol. For the simplifier, xy is NOT the same as x*y or yx. Simplifier thinks that xy is a separate variable. Good example: x*y-y*(x+2). Bad example: xy-y(x+2).</span>DO use '*' when multiplying a variable by an expression in parentheses: x*(x+2). Otherwise, my simplifier will think that you are trying to use a function and will become confused.Use parentheses liberally to avoid any ambiguity. (x+y)/(x-y) is NOT the same as x+y/x-y. x+y/x-y means x+(y/x)-y.</span>Operations<span>Use '*' (STAR) for multiplication. 2*3 is legal, 2x3 will be misunderstood.Use '^' (CARET) for power. 2^3 means 2 to degree of 3, or 8.Use '/' (FORWARD SLASH) for divisionOnly '(' and ')' (parentheses) are allowed for grouping terms. Curly or square brackets are used for other purposes.</span>

Operation priority: + and - have lowest priority, * and / h

Good Examplesx*y-x*(y+2) <-- '*' is used for multiplications a^b*3 <-- means (a to the degree of b) multiplied by 3 Bad examples<span>xy-yx <-- variable xy and variable yx are different variables y(x-2) <-- simplifier will think that it is function y of x-2.</span>
3 0
3 years ago
Other questions:
  • A basic calculator costs four pounds. How much will sixty calculators cost?
    12·2 answers
  • Sandy is upgrading her internet service. Fast internet charges $60 for installation $50.45 per month. Quick internet has free in
    9·1 answer
  • Pls help im having such a bad day already and i get yelled at 24/7
    14·2 answers
  • 6) (1, -2), (-20, 19)<br> Find slope
    7·2 answers
  • During his vacation, Dalyn rents a small boat from a rental service that charges a flat fee of $30 plus $10 per hour (including
    6·1 answer
  • In mr. B classroom, there are 29 students. Twelve students got a B, one got a C and the rest have A. What percent of the class r
    7·2 answers
  • Please answer this question now
    15·2 answers
  • Lol im SimpForKirishima my account got baneed comeback kait
    14·1 answer
  • The grass on Julie's lawn was 4.5 centimeters tall right after she mowed it. Then the grass
    6·1 answer
  • What is the area of the shape? Write your answer in square feet.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!