in how many ways could 7 song be played from a list of 17 requests

Asha builds new homes and offers her customers a choice of brick, aluminum, siding or wood for the exterior, cedar or asphalt shingles for the roof, and radiators or forced air for the heating system. How many possible configurations is Asha offering?

10. Solve each of the following, ????∈????. Round your final answer to 2 dp unless exact. 

????(3−????)^2(????^2 +5????−7)=0

molar mass of 5.8mg of silicone

The probability of juan wearing his sweater to school is three over five the probability of nick wearing his vest to school is 2 over three find the probability of juan wearing his sweater and nick wearing his vest

consider the set A = { all students in our class cohort } and the set B = { all laurier students} 

Draw a vnn diagram describing the relationship of A and B. label each section and write out three 

I’m not sure how to solve:

A librarian wants to display 10 books by Canadian authors on a bookshelf. There are three books by Joseph Boyden, and the rest are by different authors. Determine in how many ways the books can be arranged if the Joseph Boyden books must remain side by side.

in how many ways can a president, vice-president and secretary be selected from a group of 10 people? assume that one person does not hold two positions. 

You are randomly drawing a card from a deck, replacing it and then drawing another card. What is the probability of choosing a 3 and then an ace?

Fresh water fish have a mean length of 20cm and a standard deviation of 6cm. What percentage of the fish in this lake measure between 15cm and 22cm long?