Thursday

July 30, 2015

July 30, 2015

Number of results: 28

**math30**

If loga(x + b) = c, then x is equal to where a is the base. a. x = a^c – b *this is the answer* why??
*May 13, 2013 by alejandro*

**math30**

LOGARITHMS AND EQUATION SOLVING Solve for x. Round to the nearest hundredth. 2^(x+3) = 17^(x)
*July 18, 2012 by alejandro*

**math30**

Write the first three terms of the following geometric sequence: tn = 3(1/2)n-1.
*September 10, 2012 by alejandro*

**math30**

Find the amplitude, period, phase shift, and vertical displacement for: y=7sin5(x-85degrees)-1.2
*November 20, 2012 by alejandro*

**math30**

Determine the sum of the following geometric series. Round your answers to 4 decimals if necessary. a) 50 over sigma k=1 8(.5)^k-2
*September 26, 2012 by alejandro*

**Math30**

An angle with a negative rotation passes through the point(-5,-8). To, the nearest degree what is the measure of the angle?
*November 17, 2010 by Bulbul*

**math30**

Write the first three terms of a geometric sequence that has a first term of a = 7 and a common ratio, r, that satisfies r2 = 9.
*September 10, 2012 by alejandro*

**math30**

Solve log2(x-1) = 5-log2(x+3) for x. base 2.
*July 25, 2012 by alejandro*

**math30**

The number of three digit or four digit even numbers that can be formed from the numbers 2, 3, 5, 7 is A.72 B.120 C.144 D.5040
*August 4, 2013 by alejandro*

**math30**

The sum of the first 10 terms of the geometric sequence -4, 6, -9,..., to the nearest tenth, is; The answer is: For the geometric series a=-4, r=-1.5 or -3/2, n=10. Sn= a(r^n - 1)/r - 1 S10= -4((-1.5)^10 - 1)/-1.5 - 1 S10= 90.7 My question is from where they got r=-1.5 or -3/2...
*August 23, 2012 by alejandro*

**math30**

1.Use the laws of logarithms to express log2 (6) â€“ log2 (3) + 2log2 (8)^1/2 as a single logarithm; then evaluate. 2. For logy = log(0.5x â€“ 3) + log2, express y as a function of x.
*July 10, 2012 by alejandro*

**math30**

The mass of a radioactive sample is represented in the graph below. The initial mass of 32 mg decays to 8 mg after 21 hours. 1)What is the half-life of the radioactive sample, in minutes? 2)Solve each equation. a. 4 8x-1 = 8 b. 3^(2x-5) = 1/27x
*July 3, 2012 by alejandro*

**math30**

1.To play a game, a die is rolled to see who plays first. Four players are going to play the game. What is the probability that at least two people roll the same number? Express your answer to the nearest tenth of one percent
*January 26, 2013 by alejandro*

**math30**

The formula for determining the pH of a solution is pH = -log[H+], where [H+] is the hydrogen ion concentration (in M/L). What is the hydrogen ion concentration of an acid with a pH of 2.5?
*July 10, 2012 by alejandro*

**math30**

The formula for determining the pH of a solution is pH = -log[H+], where [H+] is the hydrogen ion concentration (in M/L). What is the hydrogen ion concentration of an acid with a pH of 2.5?
*July 11, 2012 by alejandro*

**math30**

1. Your city has 700 000 households, and the probability that a household has exactly one vehicle is 17/23. a) Determine the number of households that can be expected to have exactly one vehicle.
*January 26, 2013 by alejandro*

**math30**

The growth of a $40 000 investment is shown in the table. Time (years) Value ($) 0 40 000 1 42 600 2 45 369 3 48 318 4 51 459 5 54 803 Use the exponential regression function on your calculator to get the function. Round a to the nearest dollar and b to the nearest thousandth ...
*July 3, 2012 by alejandro*

**Math30-1**

Your search for a researcher has determined that an equation that models the height of a particular species of tree is y=20.2log(x), where y is height in metres and x is time in years. Predict the height of the tree after 30years and predict how old the tree will be when it is...
*June 7, 2013 by dano*

**math30**

A sequence has a first term of 24 and every other term is one half of the previous term. Find a recursive formula that defines this sequence. The answer of this question is: an=an-1*1/2 Somebody can help me and let me know why is 1/2 on the formula? please please!!!
*August 22, 2012 by alejandro*

**math30**

A sequence has a first term of 24 and every other term is one half of the previous term. Find a recursive formula that defines this sequence. The answer of this question is: an=an-1*1/2 Somebody can help me and let me know why is 1/2 on the formula? please please!!! I am not ...
*August 23, 2012 by alejandro*

**math30**

The number of cellular phone customers of a particular telephone company increased by an average of 40%/a from 1994 to 1998. If there were 963 300 customers on January 2, 1998, then the number of customers on January 2, 1994, to the nearest hundred, would have been Answer: ...
*August 7, 2013 by alejandro*

**math30**

A committee is to be formed to investigate what activities teenagers have available in small communities. The committee is to have 7 members, chosen randomly from interested community members. There are 10 parents, 5 teenagers, and 4 adults without children who have all ...
*January 25, 2013 by alejandro*

**math30**

The equation of the hyperbola is (x-3)^2/4 - (y+1)^2/16 =-1. What is the range? All I know is this but I am not even sure what I am doing!! My answer: The general form of the equation of a horizontally aligned hyperbola is: (x-h)^2/a^2 - (y-k)^2/b^2 =1. So the (y-k)^2/b^2 term...
*October 10, 2012 by alejandro*

**math30**

Sequences 1)A sequence has a first term of 24 and every other term is one half of the previous term. a)Write the first four terms of the sequence. b)Find a recursive formula that defines this sequence. c)Find an explicit formula that defines this sequence. This will be ...
*August 8, 2012 by alejandro*

**math30**

The 1933 earthquake in Japan registered 8.9 on the Richter scale. a.The 1985 earthquake in Peru registered 7.7 on the Richter scale. How many more times intense was the earthquake in Japan? Round your answer to one decimal place. b. What would the Richter scale reading be of ...
*July 11, 2012 by alejandro*

**math30**

Children’s meals are being prepared for a large gathering. There is an equal number of chicken, hamburger, and fish meals. Each meal comes with a toy: a ball, a parachute toy, or a Frisbee. There are twice as many balls as Frisbees and an equal number of parachutes and ...
*January 25, 2013 by alejandro*

**math30**

A security code used to consist of two odd digits, followed by four even digits. To allow more codes to be generated, a new system uses two even digits, followed by any three digits. If repeated digits are allowed, the increase in the number of possible codes is____ Answer: ...
*August 5, 2013 by alejandro*

**math30**

The Mean and the Standard Deviation Last year, golfers at Smith Ranch golf course had a mean score of 41 and a standard deviation of 2 on the first nine holes of the course, and a mean of 38 and a standard deviation of 1.8 on the last nine holes. One afternoon, Nathan scored ...
*February 13, 2013 by alejandro*

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