Hi Theresa!  From a finance perspective, you're looking at the difference between fixed costs (activation fee) and variable costs (usage fees).  To solve these questions, you'll need to figure out which numbers are added/subtracted, versus those that are multiplied/divided.   (a) ...

Hi Daisy, I agree with you on both of the questions.   Question 1:  Options A, C, and D refer to details of the description, rather than the observation as a whole.  Option B appears to be the best choice because it alludes to the historical rich history...

Hi Nicole!  As you may know, with a normal distribution (using the numbers from your question):   One standard deviation = 68.2% of all observations -- Lower limit = 500 - 90 = 410              = 34.1% of all...

Hi Ashley!  One of the ways you could tackle this problem is to start by converting the liters into milliliters.   1.  Since there are 1,000 milliliters in a liter, the watering can holds 4,100 milliliters of water (4.1 times 1000). 2.  Matt used 350...

Hi Susan!  Here's one way to solve this question (using a little algebra).   Since you have to remove 45% of the item's price for the advertiser, and then another 10% for the agent, you can "back into" the price by thinking in reverse.  Let's take this in two...

Hi Vivian!   To solve this question, you'll need to use a table of the standardized Normal distribution.  Fortunately, you can just use a graphing calculator, or you can find a Normal distribution calculator on the internet.  It'll ask for the three facts from your...

Hi Daniel!  It looks like you're studying sets and set notation.   a.  ∩ means the "intersection of the sets" and refers to the values that are in both sets.  {16,17,18,19} ∩ {14,16,18,20} would be {16,18}, because 16 and 18 are found in both {16,17,18,19}...

Hi Diane!  At face value (so to speak), you might think the probability is 100%.  If the judge is correct 9 times out of 10 (which is 90%), then in 10 more decisions he's likely to make 1 mistake, right?  However, the possibility also exists that he could make 0 mistakes,...

Hi Amy!  As you know, you're trying to solve for x, so you need to isolate the x.  That means moving the -4/5 from the left side over to the right side.   1.  To get rid of the -4/5, you can divide -4/5x by -4/5.  This leaves you with 1x, or simply x.         ...

Hi Nicole! To convert a decimal to a fraction, follow these steps:   1. Write down the decimal divided by 1. Take the example 2.25:        2.25          1   2. Convert both the numerator (top)...

Hi Chris!  There are three items to consider as you answer these questions.   First, what's the probability that the first card you draw will be an ace?  To solve, we need to know the number of aces in the deck, and how many total cards are in the deck.  Let's...

Hi Michelle!  As you know, we don't know the future with certainty and can only guess how an asset may grow or decline in value over time.  There could be many different outcomes, and your question suggests that there are 5 growth rates that seem most likely to occur:  6.75%,...

Hi Diane!  It looks like Susan already helped you with this one, and she provided a good answer.  :-)   Bill W.

Hi Tami!  As you may be aware, the distributive property is a way to simplify an algebraic equation.  The expression that needs to be simplified comes in the form x ( y + z ) -- which is "x times the sum of y and z."  In your case, x = -5, y = b, and z = -4,...

Hi Nia!  To solve this, it helps to look at the sequence you've been given, alongside each n:   n     x 1     2 2     6 3    12 4    20 5    30   You...

Hi Crystal!  If I understand correctly, your question is more about how to graph the equation, rather than solving it, since the values for t are already determined (e.g., the years 1985 through 2000).  For example, if t = 1988, then P = 1988 times 5.9 minus 11706, which comes to...