# Posts by emilia

Total # Posts: 19

**Statistics **

A scratch-card costs 5¤ and has two possible prizes. There is a 10% chance you get 5¤ back and a 1% chance you get 100¤. In all other cases, you get nothing. Let X denote your net winnings, i.e, (X = prize - cost). What are the expectation and standard ...

**Math**

Solve. Movie tickets cost $9.50. How much change will a customer who pays for one ticket with a $20.00 bill received?

**Math**

Solve. Movie tickets cost $9.50. How much change will a customer who pays for one ticket with a $20.00 bill received?

**Math**

Solve. Movie tickets cost $9.50. How much change will a customer who pays for one ticket with a $20.00 bill received?

**Math**

Solve. Movie tickets cost $9.50. How much change will a customer who pays for one ticket with a $20.00 bill received?

**Pre-Calc**

1.5848

**science (I NEED BACKUP!!!)**

1. Which is the most complete model of feeding relationships? a.) food web b.) food chain c.) food pyramid d.) all of the above 2. _____ eat consumers only, while _____ eat both consumers and producers. a.) Producers; carnivores b.) Carnivores; omnivores c.) Herbivores; ...

**Social Studies**

I HAD THIS QUESTION LAST YEAR!!! I CHOSE D AND IT WAS CORRECT GOOD LUCK ON YOU!

**maths sets**

All the people in a class of 35 play at least one of the games volleball,netball and hockey.10 play volleball only,5 play netball only and 3 play hockey only.if 2 play many of all 3 gamez and the equal number play 2 games.how many altogether play volleball

**Physics**

Life scientists use ultracentrifuges to separate biological components or to remove molecules from suspension. Samples in a symmetric array of containers are spun rapidly about a central axis. The centrifugal acceleration they experience in their moving reference frame acts as...

**intro to physics**

an athlete executing a long jump leaves the ground at a 28 degree angle and lands 7.6 m away. part a )what was the takeoff speed ? part b) if this speed were increased by just 8.0% , how much longer would the jump be ? for part a) i got roughly 9.48 but i am getting the ...

**intro to physics**

I was wondering if you guys can help me with this question An airplance is traveling 835 km/h in a direction 41.5 degrees west of north. part a) find the component of the velocity in the northerly direction part b) find the same but in the westerly direction part c) how far ...

**@ elena - intro to physics**

I posted this question earlier and thank you for respnding, but the answer you give me was incorrect. I try looking at hw you solve and cant find the mistake but when when I check your answer it said it was wrong. Can you please look over it again, I greatly appreciate it a ...

**intro to physics**

a toy rocket moving vertically upward passes by a 2.2m- high window whose sill is 7.0m above the ground. the rocket takes 0.17s to travel the 2.2m height of the wondow part a): what was the launch speed of the rocket ? assume the propellant is burned very quickly at blastoff ...

**intro. to physics**

a helicopter is ascending vertically with a speed of 5.20 m/s. at a height of 100 m above the Earth, a package is dropped from a window. how much time does it take for the package to reach the ground ? (hint: v0 for the package equals the speed of the helicopter). thank you !

**Statistic**

A distribution has a standard deviation of ó = 9.5. Find the z-score for a score above the mean by 4 points. note: round to 2 decimal places, and enter the value of the z-score but do not write "z = " in your answer

**Calculus Precalculus**

Yes, I saw it posted already on here.

**college**

A ladder 10 feet long rests against a vertical wall. If the bottom of the ladder slides away from the wall at a speed of 2 ft/s, how fast is the angle between the top of the ladder and the wall changing when the angle is /4 radians?

**English**

I don't need help with this, I just need your opinion. I'm in ninth grade advanced English, and one of our vocabulary words is "frequently." Do you find that hard to believe we have to "memorize" a word like that?

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