Alaptop computor sells for $850. the sales tax is 7%.

whats the total cost of the lapp top?

a. $850.07
b. $850.70
c. $909.50
d. $920

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500