# Posts by carissa

Total # Posts: 35

**Math **

A company makes batteries with an average life span of 300 hours with a standard deviation of 75 hours. Assuming the distribution is approximated by a normal curve fine the probability that the battery will last:(give 4 decimal places for each answer) a. Less than 250 hours b...

**Algebra**

One number exceeds another by 4. If three times the larger number is divided by the smaller number, the quotient is 4 and the remainder is 5. Find the numbers. (I am trying to figure out how to explain how to do this to my son. He is struggling and will be going to tutoring, ...

**Math**

How do you solve for the variable in this equation? -1 = 6 (2x -7) +22

**Math -rational exponents**

root(3,12m^2) Trying to figure out how to rewrite as an expression with a fractional exponent.Thank you for your help

**Cactus middle school**

How do I get the equation of a word problem that needs the average number of miles per gallon

**Physics**

I'm having trouble finding the speed to the problem. My book isn't helping much either. A golfer hits a shot to a green that is elevated 2.50 m above the point where the ball is struck. The ball leaves the club at a speed of 18.7 m/s at an angle of 51.0˚ above the...

**physical**

I'm working on projectile motion and I am supposed to find the speed for this problem, however I'm having trouble setting up the problem. I'm not finding any help from the book either. A golfer hits a shot to a green that is elevated 2.50 m above the point where ...

**PHYYYYYSICS 10**

A baseball is thrown horizontally off a 41-m high cliff with a speed of 18 m/s. What will be the angle in degrees between the horizontal direction and the velocity vector of the baseball just before it hits the ground? Assume that the answer will be positive and also will be ...

**PHYYYYYSICS 9**

A baseball is thrown horizontally off a 43-m high cliff with a speed of 18.3 m/s. What will be the speed of the baseball in m/s just before it hits the ground?

**PHYYYYYSICS 8**

A baseball is thrown horizontally off a 40-m high cliff with a speed of 16.3 m/s. How much time in seconds will it take for the baseball to hit the ground?

**PHYYYYYSICS 7**

An object has a velocity of (0.4 x + -1.7 y) m/s at the origin at t = 0. It experiences a constant acceleration of (0.2 x + -1 y) m/s2. What is the distance between the object and the origin at t = 3 s?

**PHYYYYYSICS 6**

Three marksmen stand at the top of a building. Two of them fire identical bullets out of identical rifles. The bullets leave the rifles with the same initial speed. The last marksman forgot his rifle, so he drops his bullet off the edge of the building from the same height as ...

**PHYYYYYSICS 5**

Two trucks driven by Abby and Brian start at the same position and take off in different directions in an open field. Abby is traveling at a speed of 40 mph in a direction 30° south of west. Brian is traveling at a speed of 56 mph in a direction 75° north of east. What...

**PHYYYYYSICS 4**

A plane points its nose due north and flies at a speed of 71 m/s relative to the air. The plane enters a strong wind that blows at a speed of 23 m/s due west relative to the ground. What is the angle of the plane's trajectory according to an observer standing on the ground...

**PHYYYYYSICS 3**

A golfer hits a golf ball, giving it an initial speed of 31.7 m/s at an angle of 55° above the horizontal. How far in meters will the golf ball travel horizontally before hitting the ground?

**PHYYYYYSICS 2**

A golfer hits a golf ball, giving it an initial speed of 39.7 m/s at an angle of 55° above the horizontal. What is the maximum height in meters that the golf ball will achieve?

**PHYYYYYSICS**

A catapult launches a stone at an angle of 20° above the horizontal at a speed of 26.8 m/s. Assuming the stone begins its trajectory at the origin, determine the distance in meters from the origin that the stone achieves after 1.05 s. Note: The stone will change position ...

**PHYSICS HELP**

A man stands at the top of a 27-m high building and throws a penny straight downward. If the penny has an initial velocity of -3.9 m/s, what is the velocity of the penny in m/s when it hits the ground?

**physics**

A man stands at the top of a 27-m high building and throws a penny straight downward. If the penny has an initial velocity of -3.9 m/s, what is the velocity of the penny in m/s when it hits the ground?

**math algebra 1**

find the possible values of b (7,b),(-1,3); d= 2radical sign7

**Science**

i pod metal toothpaste talcum powder

**algebra**

YOU EARN 15N DOLLARS FOR MOWING N LAWNS.HOW MUCH DO YOU EARN FOR MOWING ONE LAWN? SEVEN LAWNS

**Chemistry**

If the average velocity of O2 molecules at STP is 3.4*10^3 meters/sec, what is the average velocity of H2 molecules at the same temperature and pressure?

**physics**

An airport has runways only 132 m long. A small plane must reach a ground speed of 40 m/s before it can become airborne. What average acceleration must the plane’s engines provide if it is to take off safely from its airport? Answer in units of m/s2

**math**

thank you

**math**

8+12 rewrite using commutative property

**Technology**

Assume that a movie is two hours long, that the frame rate is 30 frames per second, and that the resolution per frame is 1080i (1920x1090 pixels per frame), and that each pixel is represented by three colors (Red, Green, Blue) where each color is described by one byte. A) how ...

**Science**

Why do all planets revolve around the sun?

**Physics**

How do I find out how much heat it takes to raise the temperature of 100 grams of aluminum from 50 degrees celcius to 80 degrees celsius. The specific heat is 900j/kg First I did 100*30*900 and it equalled 2,700,000. that seems to high, is it? I then multiplied 100*30*.9 and ...

**Physical Science**

How do I write and balance this chemical equation as a double replacement reaction: K2SO4(aq) + PB(NO3)2 (aq)

**8th grade**

what is the scramble word for eisuss for election unscramble?

**physics!**

A soccer ball is kicked from the top of a 256 foot building with an initial velocity of 6 ft/s. What will the ball's velocity be at the instant before it strikes the ground?

**physics please help**

A soccer ball is kicked from the top of a 256 -foot building with an initial velocity of 6 ft/s. How far from the base of the building will the ball land?

**math**

48x+996-46y=496

**Social Studies**

Where can i find stuff about ancient china Start with a list and overview of Chinese dynasties and the preimperial period, and then decide how "ancient" you want to go. Here is a good place to start: (Broken Link Removed) Then use google.com or wikipedia.com or a ...

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