Phone A telephone number consists of a three-digit area code followed by a seven-digt local code
Neither the area code nor the local code may have a first digit of 0 or 1. If the codes 800,888,
877 and 866 are toll-free codes and are not used as area codes, how many ten-digit telephone
numbers are possible? Express your answer in scientific notation with four significant digits.

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.

mean, 40.6

step-by-step explanation:

$54.99

step-by-step explanation:

$54.99 includes 500 min. if she does not exceed 500 min then her bill is $54.99

actually your concept is wrong

step-by-step explanation:

150% of x =300

150x=300×100

x=(300×100)÷150

x=200