Jessica Maths
Most popular questions and responses by Jessica Maths
Pre Calculus
Find the exact value ofcos (u+v) given that sin u= 7/25 and cos v=−12/13. (Both u and v are in Quadrant II.)
asked on July 11, 2016 
Pre Calculus
The population P of a culture of bacteria is described by the equation P = 1600e^0.052t where t is time, in hours, relative to the time at which the population was 1600. (a) What was the population at t = 6 hours? Show your work. (b) After how many hours
asked on July 6, 2016 
Pre Calculus
Evaluate the function f(x) = log3 x at x =1/27 without using a calculator a. –4 b. –2 c. 1/27 d. –3 e. 27
asked on July 5, 2016 
Pre Calculus
Tritium, a radioactive isotope of hydrogen, has a halflife of 12.4 years. Of an initial sample of 69 grams, how much will remain after 75 years? a. 1.5848 grams b. 61.5289 grams c. 0.0000 grams d. 1.0426 grams e. 17.2500 grams
asked on July 6, 2016 
Pre Calculus
Find the value of x. log4 65,536 = x a. x = 32,768 b. x=8 c. x = 65,536 d. x=4
asked on July 6, 2016 
Pre Calculus
Determine the quadrant in which an angle, θ, lies if θ = 5.40 radians. a. 4th quadrant b. 3rd quadrant c. 2nd quadrant d. 1st quadrant
asked on July 10, 2016 
Pre Calculus
Assume that x, y, and b are positive numbers. Use the properties of logarithms to write the expression logb ^8xy in terms of the logarithms of x and y. a. logb^8 + logb x + logb^y b. logb^8+logbx c. logb^8+logby d. logb^8 + log8 x + log8^y e. logb^8+log8xy
asked on July 6, 2016 
Pre Calculus
Determine two coterminal angles (one positive and one negative) for θ = −503°. a. 217°,− 323° b. 217°, − 143° c. 307°, − 413° d. 127°, − 323° e. 127°, − 233°
asked on July 10, 2016 
Pre Calculus
17. population growing at an annual rate r will triple in a time t given by the formula t = ln 3/r If the growth rate remains constant and equals 9% per year, how long will it take the population of the town to triple? a. 6 . 6 years b. 1 years c. 5 . 3
asked on July 6, 2016 
Pre Calculus
Simplify the expression. log3 36 a. 6 b. 36 c. 3 d. 18 e. none of these
asked on July 6, 2016 
Pre Calculus
Simplify the expression. 9 log 9 2 This is 9 to the power of log base 9 of 2 a. 2 b. 18 c. 4 d. 9 e. none of these
asked on July 6, 2016 
Pre Calculus
Write the equation 5^2= 25 in logarithmic form. a. log255=2 b. log25=25 c. log52=25 d. log225=5 e. log525=2
asked on July 6, 2016 
Pre Calculus
Perform the operation shown below and leave the result in trigonometric form. [8(cos10° + i sin10°)] [5(cos 200° + i sin 200°)]
asked on July 13, 2016 
Pre Calculus
Multiply; then use fundamental identities to simplify the expression below and determine which of the following is not equivalent. (sin x + cos x) ^2 a. 1+2sinxcosx b. sec^2x−tan^2x+2cosxsinx c.sec x + 2 sin x/sec x d. sin^2x+cos^2x e. 1+2cos (pi / 2 
asked on July 11, 2016 
Pre Calculus
16. Use a calculator to find a value for ln16.1 to four decimal places. a. 2.7788 b. –2.7788 c. –1.2068 d. 5.0814 e. 1.2068
asked on July 6, 2016 
Pre Calculus
Assume that x, y, and a are positive numbers. Use the properties of logarithms to write the expression log a 9 xy in terms of the logarithms of x and y. a. 9logbx+9logby b. 19 l o g b ( x + y ) c. 19 l o g b x + l o g b y d. logbx+logby e. 19 l o g b x +
asked on July 5, 2016 
pre calculus
Use the halfangle formula to simplify the given expression. squareroot 1+cos12x/2
asked on July 11, 2016 
Pre Calculus
Use the sumtoproduct formulas to find the exact value of the given expression. sin 150° + sin 30°
asked on July 11, 2016 
Pre Calculus
Use a calculator to find the value for log0.94769 to four decimal places. a. –0.0536 b. –0.9767 c. 0.9767 d. 0.0232 e. –0.0232
asked on July 6, 2016 
Pre Calculus
Assume that x, y and a are positive numbers. Use the properties of logarithms to write the expression loga x ^6y ^7 in terms of the logarithms of x and y. a. 42loga^x+y b. 42loga^x+7loga^y c. 6loga^ x + 42loga^ y d. 6loga^x+7loga^y e. 6loga^x+6loga^y
asked on July 6, 2016 
Pre Calculus
22. Solve the equation. 2x = 5 a. x = 0.5541 b. x = 5.8628 c. x = 2.3219 d. x = 1.4307 e. x = 1.6652
asked on July 6, 2016 
Pre Calculus
Identify the xintercept of the function f(x) = 2 ln(x3). a. x=3 b. x=0 c. x=2 d. x=4 e. The function has no xintercept
asked on July 5, 2016 
Pre Calculus
Can you give me an example of properties of functions in a real life example?
asked on July 4, 2016 
Pre Calculus
Write f(x) =x^311x^2+18x+32 in the form f(x)= (xk) q (x) +r when k=6 + (square root)6, and demonstrate that !@#$%^&)=r
asked on July 4, 2016 
Pre Calculus
a. Identify the horizontal asymptotes of the function f(x)=x+6 / x+1 ( / = divided by/over) b. Make a summary of how you may sketch a graph of this rational function.
asked on July 4, 2016

math
I guess that's what they did too as I had the same question and made the same mistake
posted on July 11, 2016 
math
sorry I did 7+1
posted on July 11, 2016 
Pre Calculus
so I got cos(u+v)=204/325 is this correct?
posted on July 11, 2016 
pre calculus
is it cos12x?
posted on July 11, 2016 
Pre Calculus
Sorry, I have figured out this one but cannot figure out this one Use the sumtoproduct formulas to write the given expression as a product. sin 4θ − sin 2θ Could you help me with this one instead please?
posted on July 11, 2016 
AP Chemistry
DrBob222 please could you help me with this? Can you explain to me how to answer it?
posted on July 7, 2016 
AP Chemistry
I think that the reaction is spontaneous because no outside force is required for it to take place. Is this correct? I'm not sure about the other two parts to the question. Can you help me?
posted on July 7, 2016 
Pre Calculus
No I'm just not sure how to enter that into my calculator
posted on July 6, 2016