# math30

28 results

**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??

**math30**

LOGARITHMS AND EQUATION SOLVING Solve for x. Round to the nearest hundredth. 2^(x+3) = 17^(x)

**math30**

Write the first three terms of the following geometric sequence: tn = 3(1/2)n-1.

**math30**

Find the amplitude, period, phase shift, and vertical displacement for: y=7sin5(x-85degrees)-1.2

**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

**Math30**

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

**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.

**math30**

Solve log2(x-1) = 5-log2(x+3) for x. base 2.

**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

**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...

**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.

**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

**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

**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?

**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?

**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.

**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 ...

**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...

**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!!!

**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 ...

**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: ...

**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 ...

**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...

**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 ...

**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 ...

**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 ...

**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: ...

**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 ...

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