Find the term named in the problem geometric sequence and series 1). -3,-6,-12,-24 find a10

2). -2,6,-18,54 find a12

See explanation

Step-by-step explanation:

The nth term of a geometric progression is calculated by:

= ar^n-1

1). -3,-6,-12,-24 find a10

a = first term = -3

r = common ratio = -6/-3 = 2

n = 10

Using the formula

a10 = ar^n-1

a10 = -3 × 2^10-1

a10 = -3 × 2^9

a10 = -3 × 512

a10 = -1536

2). -2,6,-18,54 find a12

a = first term = -2

r = common ratio = 6/-2 = -3

n = 12

Using the formula

ar^n-1

a12 = -2 × -3^12-1

a12 = -2 × -3^11

a12 = -2 × -177147

a12 = 354294

answer: 819.89 miles across america

step-by-step explanation:

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.