How many 7-digit phone numbers can be formed if the first digit cannot be 0 or 1, and any digit can be repeated

8 × 10⁶

Step-by-step explanation:

The first digit can be any number from 2 to 9. We can select any of the eight digits.

We can select the remaining digits in ten different ways.

Each choice is independent, so we can multiply the choices together.

N = 8 × 10 × 10 × 10 × 10 × 10 × 10

  = 8 × 10⁶ possibilities

There are 8 × 10⁶ possible seven-digit phone numbers.

my answer got deleted but it's a

step-by-step explanation:

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40