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2 years ago

14

The police in a certain city are investigating whether the proportion of minor traffic accidents is greater on Friday nights tha

n on Saturday nights

1 answer:

Ganezh [65]2 years ago

8 0

What city lol? sorry i just need to answer so i can ask question bc i’m lost lol

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Kathy runs a 26.2- mile marathon at an average pace of 6.2 minutes per mile how long will it take her to finish

drek231 [11]

Around 2:45:34
hope this helps

6 0

3 years ago

Read 2 more answers

Find the slope and y-intrcept of <br><br>y=5/3x -4

natima [27]

Answer:

Slope: 5/3

y-intercept: (0, -4)

Step-by-step explanation:

Slope-Intercept Formula: y = mx + b

<em>y</em> is your output.

<em>m</em> is your slope.

<em>b</em> is your y-intercept.

7 0

3 years ago

Suppose the area of a circle is 4π. What is its diameter?

mart [117]

Area=pi times radius^2 so

if area=4pi=pi times r^2
4 times pi=r^2 times pi
divide both sdies by pi
4=r^2
square root
2=radius since legnth cannot be negative

radius=1/2 diamters
2 radius=diameter
2(2)=diameter=4
diameter=4

6 0

3 years ago

Read 2 more answers

The height H of an ball that is thrown straight upward from an initial position 3 feet off the ground with initial velocity of 9

mariarad [96]

Answer:

The ball will be 84 feet above the ground 1.125 seconds and 4.5 seconds after launch.

Step-by-step explanation:

Statement is incorrect. Correct form is presented below:

<em>The height </em> $h(t)$ <em> of an ball that is thrown straight upward from an initial position 3 feet off the ground with initial velocity of 90 feet per second is given by equation </em> $h(t) = 3 +90\cdot t -16\cdot t^{2}$ <em>, where </em> $t$ <em> is time in seconds. After how many seconds will the ball be 84 feet above the ground. </em>

We equalize the kinematic formula to 84 feet and solve the resulting second-order polynomial by Quadratic Formula to determine the instants associated with such height:

$3+90\cdot t -16\cdot t^{2} = 84$

$16\cdot t^{2}-90\cdot t +81 = 0$ (1)

By Quadratic Formula:

$t_{1,2} = \frac{90\pm \sqrt{(-90)^{2}-4\cdot (16)\cdot (81)}}{2\cdot (16)}$

$t_{1} = 4.5\,s$ , $t_{2} = 1.125\,s$

The ball will be 84 feet above the ground 1.125 seconds and 4.5 seconds after launch.

3 0

3 years ago

Luis said that when his dog was born, she had a mass of 370 grams and that when fully grown, his dog had a mass of 37 kilograms.

yanalaym [24]

I do not agree. This is because when the dog was a puppy, she was 370 grams not kilograms. Diego's mistake was mistaking grams for kilograms.

4 0

3 years ago