# Posts by jayla

Total # Posts: 34

**Prob & Stats **

A medical researcher gave 100 patients a new drug to see if it reduces their blood pressure? Did the new drug reduce the patients' blood pressure? Write your hypothesis mathematically. Not sure how to do this, Prob & Stats has been quite a struggle for me

**Chemisty**

if the chemist mistakenly makes 275 ml of solution instead of the 200ml, what molar concentration of sodium nitrate will the chemist have actually prepared

**Math**

Use the normal distribution of weights of adult men, which has a mean of 170 pounds and a standard deviation of 7.5 pounds. Use the z-score chart to find the percentage of heights less than 155 pounds.

**Social studies**

type of American indian dwelling in eastern woodlands

**Math**

Mrs.Carter bought 7 dry erase markers for $40. How much would 20 markers cost ?

**Math**

Gerald works 18 hours each week. He earns $10 a hour.Write an expression to find how much Gerald earns in 1 week

**Math**

Ben has a collection of 15 coins in quarters and dimes. There are 7 quarters in the collection. Is the ratio of quarters to dimes the same as dimes to quarters ?

**Math**

Paula works out with a 2.5 kilogram Mass what is the mass of the 2.5 kilogram mass in grams

**math**

Midson draws a cone shape paper with height of 9 centimeters and a volume of 48 pi centimeters. What is the diameter of Midsons paper cup plz show all work

**Science**

3.43

**Math**

there are 750 students in the whole school.but there is 120 more girls than boys.how many boys are there?

**Math**

I wounder what is 5(29)? I just really don't under stand how to solve it.

**social studies**

what is one factor that contributes to philadelphias reputation as an important industrial center

**math**

what does linear an nonlinear functions mean? I need help asap please i am begging you because i am a new student at this school and i don't get what the difference is between linear and nonlinear functions.

**MATH**

a purse contains $1.35 in quarters nickels and dimes There are 3 times as many dimes as quarters and 3 more nickels than quarters. find the number of each coin

**physical science**

A birthday candle 4 cm high is 10 cm from a converging lens whose focal length is 15 cm. Use a ray diagram on a suitable scale to find the location of the image, its height, and whether it is erect or inverted, real or virtual.

**Sciece**

The primary of a step-down transformer connected to a 240 V source has 1000 turns. The secondary has 100 turns. What is the output voltage of this transformer?

**Math**

Alex works 4 hours on tuesday,thursday ,and Friday.He earns $6.50 per hour.He is saving to buy a television that costs $525.How many weeks will Alex have to work to buy the television?

**Math**

Alex works 4 hours on tuesday,thursday ,and Friday.He earns $6.50 per hour.He is saving to buy a television that costs $525.How many weeks will Alex have to work to buy the television?

**science**

what causes grains of sand to stick together

**chemistry**

For the system CaO(s) + CO2(g) = CaCO3(s), I added 1.00 mol of CaO(s) to 1.00L of 0.500M CO2(g) at 200 oC. At equilibrium the [CO2] = 0.150M. What is the value of Kp for this reaction?

**chemistry**

A study of the system, H2(g) + I2(g) == 2 HI(g), was carried out. Kc = 54.9 at 699.0 K (Kelvin) for this reaction. A system was charged with 2.50 moles of HI in a 5.00 liter vessel as the only component initially. The system was brought up to 699.0 K and allowed to reach ...

**chemistry**

An electric range burner weighing 614 grams is turned off after reaching a temperature of 499.0oC, and is allowed to cool down to 22.2oC. Calculate the specific heat of the burner if all the heat evolved from the burner is used to heat 565 grams of water from 22.2oC to 80.9oC.

**math**

It would equal 4/14 because 211/14 equals 1/14

**math**

240.4

**math**

sandra wrote the sequence below 2,5,10,17,... which equation represents the rule for finding the nth term of this equation

**Math**

Two rectangles have an area of 81 square inches. Name two possible perimeters for the rectangles

**3rd grade math**

what about 160

**chemistry**

How many joules of heat would be required to completely melt 5.00 grams of H2O (s) at 0C to H20 (l) at 0C

**science**

which bread will mold the fastest? is it wheat bread or white bread

**math**

how do i solve this problem? find an equation for a line that is tangent to the graph of y=e^x and goes through the origin.

**Math**

OK, I have had trouble with math, 'C' average, and we are learning proportions. I don't get them! Can someone please do a proportion and then tell the steps to do it? Ex. 4/6= 8/X. Steps: 4/6 equals 8 over x. You do _______ do get ________ over , so X=12. [I know ...

**Ordering decimals**

need help

**how far is the star el nath from the sun**

HOW FAR IS THE STAR EL NATH FROM EARTH PLEASE

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