The access code for a car's security system consists of six digits. the first digit cannot be 3 and the last digit must be even . how many different codes are available?

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?