# Posts by ro

Total # Posts: 30

**chemistry**

The average human body has 1.4x10^2 g of total K within it. Calculate the activity in disintegration/year of the potassium-40 in the average human body using your value of t1/2 (or K) of this substanc

**Math**

What force do you have to apply weighing 1000 ibs to have it accelerate to .2 m sec

**Principles of Finance**

100000

**Check my Science questions?**

Same Geislyn

**Algebra**

76

**math**

An artifact was found and tested for its carbon-14 content. If 79% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? (Carbon-14 has a half-life of 5,730 years.)

**math**

a boy is walking at dusk and notices his shado from a nearby street light. the boy is 5 feet tall and the street light is 12 feet above the ground. When the boy is 4 feet from the base of the street light how long will his shadow be?

**physics**

prob 11: its a=3/5 as the probability of occurrence of |0> is 9/25 with normalisation, we find out b=4/5

**math**

thanks so much!

**math**

simplify 5+ 1/3x1/3x1/3-(1/9+1/9)

**math**

Simplify 2 3/18 + 5 3/12 - 4 2/4

**math**

5/22 - 1 /41 then reduce

**math**

Solve: Eighty people were invited to vote in thr extension club's elections and 9/10 of them voted. How many people voted in the elections?

**math**

Statistics: Analyze student exam scores Students were given an exam with 300 multiple choice questions. The distribution of the scores were normal and the mean was 195 with a standard deviation of 30. you may find it helpful to draw out this distribution before answering the ...

**finance**

A speculator sells a stock short for $55 a share. The company pays a $2 annual cash dividend. After a year has passed, the seller covers the short position at $45. What is the percentage return on the position (excluding the impact of any interest expense and commissions)? ...

**Science**

which of these two methyl orange and phenolphthalein gives more reliable and consistent results in the titration of H3PO4 with NaOH

**PSY 285**

how can social cognition may both positively and negatively affect one's attitudes and behaviors?

**physics**

A weight of 30.0 N is suspended from a spring that has a force constant of 180 N/m. The system is undamped and is subjected to a harmonic driving force of frequency 11.0 Hz, resulting in a forced-motion amplitude of 5.00 cm. Determine the maximum value of the driving force. ...

**History**

a

**12th grade**

Find altitude of isosceles triangle if angle=53 degrees and base is 8 inches.

**trig**

Find altitude of isosceles triangle if angle=53 degrees (the equal angles) and the base is 8 inches.

**Math**

Find altitude of isosceles triangle if è=53 degrees (the equal angles) and the base is 8 inches.

**12th grade**

Angle elevation of sun is 25 degrees. Find the length the shadow cast by a tree 41 feet tall.

**French**

je sais faire la tarte aux pommes

**physical science**

What is a compound that has water chemically attached to its ions?

**Need website showing regional cultural differences**

world regions, thank you!

**Need website showing regional cultural differences**

a table would be great!

**BUSINESS MATH**

Keeping track of how much it costs to have a horse, per month: board, food, wormer, farrier work, etc.

**Math Fractions Vocabulary**

What is "one of two numbers whose product is one". It's in a crossword, 21 letters, 4th letter is "T". Please help!

**History - Common Sense Thomas Paine**

Why would the colonists loyal to the British object to Thomas Paine's Common Sense?