2,195 Answered Questions for the topic Pre Calculus

Pre Calculus Math Algebra 2

05/01/18

A function f has the property that f(x/2) = Sqrt((1 + f(x))/2) for 0 <= x <= 1. If f(a) = 0 where 0 <= a <=1, what is the value of f(a/4)?
Apparently the answer is 0.98, but I have no idea how to get that.
Follows • 2
Expert Answers •1
Pre Calculus Calculus Half Life

04/29/18

A fossilized leaf contains 13% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as the half-life of carbon 14
Show all steps. 
Follows • 2
Expert Answers •1
Pre Calculus Calculus Investment

04/29/18

The value of a particular investment follows a pattern of exponential growth. In the year 2000, you invested money in a money market account
The value of your investment t years after 2000 is given by the exponential growth model A = 8300e^0.064t. How much did you initially invest in the account?
Follows • 3
Expert Answers •1
Pre Calculus Calculus Investment

04/29/18

Find out how long it takes a $2900 investment to earn $500 interest if it is invested at 7% compounded semiannually. Round to the nearest tenth of a year
Use the formula A = P (1 +r/n)^nt.
Follows • 3
Expert Answers •1

04/29/18

Larry has $2800 to invest and needs $3300 in 20 years
What annual rate of return will he need to get in order to accomplish his goal, if interest is compounded continuously? (Round your answer to two decimals.)
Follows • 2
Expert Answers •1
Pre Calculus Calculus Logarithms

04/29/18

Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic expressions. Give the exact answer.
log 3 (x + 6) + log 3 (x - 6) - log 3 x = 2
Follows • 2
Expert Answers •1

04/29/18

Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution
7^x = 6^x + 7
Follows • 2
Expert Answers •1

04/29/18

Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1.
QUESTION IS:1/5 [5ln (x + 9) - ln x - ln (x^2 - 9)]
Follows • 2
Expert Answers •1

04/29/18

Logarithim Question
Solve the Equations   1.log x=6   I got 100,000 but I am just checking to see if I am correct   2. log(lower)5 (regular)5^3   I got 3  
Follows • 2
Expert Answers •1

04/28/18

Evaluate or simplify the expression without using a calculator. 10log 6√x
Show all steps for 10 log 6 radical x
Follows • 2
Expert Answers •1
Pre Calculus Calculus Domain Logarithms

04/28/18

Find the domain of the logarithmic function. f(x) = log(x+5/x-2)
Show all steps. The equation is f(x)=log (x+5 over x-2)
Follows • 2
Expert Answers •1

04/28/18

Write the equation in its equivalent logarithmic form. root(3,125)=5
The 3 is outside of the root and the 125 is in the root.
Follows • 2
Expert Answers •1

04/28/18

Use the compound interest formulas A=P(1+(r)/(n))^nt and A=Pe^rt to solve.
Find the accumulated value of an investment of $5000 at 7% compounded continuously for 6 years.
Follows • 2
Expert Answers •2
Pre Calculus Sigma

04/24/18

Converting a series to sigma notation
Convert the following series into sigma notation: 1+4+16+...256
Follows • 2
Expert Answers •1
Pre Calculus Sigma

04/24/18

Converting a series to sigma notation
Write the series -8+4-2+1 in sigma notation. 
Follows • 2
Expert Answers •1
Pre Calculus Sigma

04/24/18

Write the following series in sigma notation: 1+4+16+...+256
 There are no additional details following my question
Follows • 2
Expert Answers •1
Pre Calculus Calculus

04/22/18

Find the accumulated value of an investment of $ 17,000 at 6% compounded annually for 13 years.
Use the compound interest formulas A = P(1+r/n)^nt and A=Pe^rt to solve.
Follows • 2
Expert Answers •2
Pre Calculus Vectors Vectors 2d

04/10/18

If vector u is <3,4> and vector b is also <3,4>, then is vector a parallel to b or is it equal to it
I am honestly confused on if 2 vectors have the same change in x and y values then is it parallel or equal to it. And for example if 1 vector is double the other then how are they parallel, whywo... more
Follows • 2
Expert Answers •1

04/07/18

Put the equation into standard form and identify the vertex, focus and directrix.
25x2+ 20x + 5y − 1 = 0
Follows • 2
Expert Answers •1
Pre Calculus Precalculus

04/07/18

Solve the equation over the interval [0, 2π), stating answer(s) in radians: sin^2 x - 2sinx + 1 = 0
A) π/2    B) 3π/2    C) 2π/3    D) π/2, 3π/2 It would be much appreciated if someone could explain how to get the answer.
Follows • 2
Expert Answers •1
Pre Calculus Precalculus

04/07/18

Find the solutions to sin^2 (x) + cos(x) = 1, keeping 0 ≤ x < 2π
A)x = 0, π/2, 3π/2 B)x = π/2, 3π/2, 2π C)x = 0, −3π/2, 3π/2 D)x = π/6, π/4, π/3 It would be much appreciated if someone could explain how to get the answer.
Follows • 2
Expert Answers •1

04/06/18

Ship leaves a port at N50°E at 15 knots, then turns 80° southeast 2 hours later. After three hours at 20 knots, what is the bearing of the ship?
Full question: A a ship leaves a port with a bearing of N50°E at a speed of 15 knots. After 2 hours the ship turns 80° southeast. After three hours at a speed of 20 knots, what is the bearing of... more
Follows • 1
Expert Answers •1
Pre Calculus

04/05/18

if sin of theta equals 3/6 calculate tan of theta
if sin of theta equals 3/6 calculate tan of theta We did not understand
Follows • 2
Expert Answers •1

04/03/18

The half life of a radioactive element is 23 days. How long until 21% of the initial amount remains? Include units in your answer?
The half life of a radioactive element is 23 days. How long until 21% of the initial amount remains? Include units in your answer?
Follows • 2
Expert Answers •1
Pre Calculus

03/28/18

solve for the variable?
| 2  -1| | 3  4m| = -16   Solve for m?
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.