At a diner, the cost for a specialty waffle and a hashbrown is $9.50. The cost for 2 specialty waffles and 3 hashbrowns is $20.50. Determine the cost of a waffle and the cost of a hashbrown.

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Write the equations in logarithmic form 10^3=1,000

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?