# Posts by marcy

Total # Posts: 21

**Math fractions**

kate is using fraction strips to add 4/10 and 4/5 she uses one whole strip to represent the sum. how many fifths strips does she need to complete the sum?

**Math**

The area of a. Front cover of a book is 120 square inches. The perimeter is 44 inches.what are the dimensions of the cover. HELP

**chemistry**

When hydrogen peroxide (H2O2) is used in rocket fuels, it produces water, oxygen, and heat. 2H2O2(l)⟶2H2O(l)+O2(g)ΔH=−196kJ How many kilojoules are released when 2.65 moles of H2O2 reacts? How many kilojoules are released when 234 g of O2 is produced?

**Math**

Convert the following number to scientific notation: 71,000,000,000

**world geo.**

Under the Articles of Confederation, the federal government was made up of __________.?

**social studies**

Henry clay

**Math**

Jessica has 9 more nickels than dimes, and the total value of her coins is 1.50. How many nickels does she have. Write the best equation.

**physics**

the field just outside a 20 cm-radius metal ball is 5x10^(2) N/C outwards. a) what is the flux through the surface of the ball? b) what is the net charge enclosed inside the ball?

**algebra**

if i had 100 dimes and quarters and the total value was $14.05, how many quarters would i have?

**chemistry**

A buffer is made by dissolving H3PO4 and NaH2PO4 in water. a. write an equation that shows how this buffer neutralizes a small amount of acids. b. write an equation that shows how this buffer neutr?

**pre calc**

find the exact values of the six trigonometric functions of theta if the terminal side of theta in standard position contains the given point: 1. (8, 4) 2. (4, 4√3) 3. (0, -4) 4. (6, 2)

**pre calc**

find the exact values of the six trigonometric functions of theta if the terminal side of theta in standard position contains the given point: 1. (8, 4) 2. (4, 4√3) 3. (0, -4) 4. (6, 2)

**Business Math**

Nic has a revolving dept store credit card account with rate 15%annually. Lastmonth balance on the account was $423.78. During the current month, he made purchases totalling $123.42 and made a payment of $100.00. The store uses the unpaid balance method. What must be the amt ...

**physics**

A person has a mass of 50.0 kg. What is the pressure they exert on the blades of their ice skates if each skate blade is 15.0 cm long and 5.00 mm wide?

**pscyhology**

5 is not A.

**math**

Thank you for the clarification!

**math**

log(2.848) = 1.602 * 1.778 Is this a true statement? Why or why not?

**Math**

How would I solve this Equation? DB = 10log(I/Io) DB = 10log (140 Io/Io) DB = 10 log (140) DB = ????? This is as far I have gotten on this equation. Can someone please help me finish? I am trying to determine how many times louder than the threshold of sound is from 140 Decibels.

**8th grade Social Studies**

i need help with my homework questions. Can you help me now?

**Science**

The ancient Greeks discounted Democritus' ideas and blindly followed the belief of the "elements." Which method could they have used to discount their ideas and give credence to Democritus' ideas? A.Scientific Method B.Have any scientific ideas C.Know how to ...

**Physics**

A 4.5 g bullet is stopped in a block of wood (m= 5.04 kg). The speed of the bullet-plus-wood combination immediately after the collision is 0.298 m/s. What is the original speed of the bullet? Answer in m/s. I did it like this and got it wrong: mv=MV .298= (.0045kg)(velocity) ...