# Posts by irma

Total # Posts: 36

Math
Find the distance between the two points: P1= ( -1,0) and P2= (2,4)

Algebra
An object is dropped from a bridge. Find the distance the object has fallen when its speed reaches 132 ft/s. Use the equation v = 64d , where v is the speed in feet per second and d is the distance in feet.

Math
As part of a conservation effort for a lake, 70 fish were caught, tagged, and then released. Later, 80 fish were caught from the lake. Four of these 80 fish were found to have tags. Estimate the number of fish in the lake.

Math
Triangles ABC and DEF are similar. Find side AC. Round your answer to the nearest tenth. cm

Math
The sum of two numbers is five. The sum of the squares of the two numbers is thirteen. Find the two numbers. (Enter your answers as a comma-separated list.)

Physics
A standard man uses crutches. The crutches each make an angle of 25 degrees with the vertical. Half the standard man's weight is supported by the crutches; Assuming the standard man is motionless, find the magnitude of the force supported by each crutch.

chemistry
What is the equation that represents the reaction of esterification of crystal violet? Thanks

math
how you do percentages?

math
The stopping distance (s) of a car varies directly as the square of its speed (v). If a car traveling at 50 mph requires 170 ft to stop, find the stopping distance for a car traveling at v2 = 55 mph.

math
If a car traveling at 50 mph requires 170 ft to stop, find the stopping distance for a car traveling at v2 = 60 mph.

algebra
If a car traveling at 50 mph requires 170 ft to stop, find the stopping distance for a car traveling at v2 = 60 mph.

math
What percent of 36 is 90?

math
a square sheet of tin 30cm on a side is to be used to make an open - top box by cutting a small square of tin from each corner and bending up the sides. how large should be the square cut from each corner to make the box's volume as large as possible

Math Technology
A pilot is flying to a destination 700 miles away at a bearing of 105 degrees. The cruising speed of the plane is 500 mile per hour and the the wind is blowing between 20 and 30 miles per hour at a bearing of 30 degrees. At what bearing should the pilot aim the plan to ...

geometry
what is the distance between N(5,2),K(-2,8)

math
pauline has 35 cups of flour. She makes cakes that require 2 1/4 cups each. if she makes as many such cakes as she has flour for, how much flour will be left over?

Math
what is 1/5 in base 5?

Chemistry
Urea, (NH2)2CO, is dissolved in 73.5 g of water. The solution freezes at -0.095°C. How many grams of urea were dissolved to make this solution? (Answer must be in grams)

Chemistry
In a mountainous location, the boiling point of pure water is found to be 95°C. How many grams of sodium chloride must be added to 9 kg of water to bring the boiling point back to 99°C? Assume that i = 2. So what will my answer be in grams?

math
Yes, thanks so much! Irma

math
Repeated addition is like 4+4+4

math
Write a word problem for 5 x 2 1/2 which requires the use of repeated addition model.

how do I solve 3/4 +1/2= 1 1/y y=?

algebra
If LOGx (A)=0.7 and LOGx (B) =0.5 how do I solve LOGx (B/A)

algebra
ln(3x-4)-Ln(x+1)=Ln(2)

college algebra
Am not sure how to plug in e^e on calculator

college algebra
3^x-2=11

college algebra
Do not know how to evaluate: e^e

college algebra
Solve: 2^x-3= 32^x+1

Economics
If at least 1 of the conditions for a perfectly competitive market is not met, does this invalidate the model of perfect competition?

intermediate algebra
A farmer with 3000 feet wants to enclose a rectangular plot that borders on a straight highway. If the farmer does not fence the side along the highway, what is the largest area that can be enclosed?

intermediate algebra
A farmer with 3000 feet of fencing wants to enclose a rectangular plot that borders on a straight highway. If the farmer does not fence the side along the highway, what is the largest area that can be enclosed?

chemistry
P total = 0.45 + 0.25 + 0.60 = 1.3

chemistry
What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm

chemistry
What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm

chemistry
what are the reasons why the Cu(II) solution has to be titrated immediately after addition of KI?

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