Answer:
1. The correct option is 3.
2.The correct option is 3.
3.The correct option is 3.
4.The correct option is 4.
Step-by-step explanation:
1.
Sameera planned a rectangular walkway to be 25 ft long. She decides to change the walkway to be 45 ft long.
The scale factor is



The scale factor is 9/5, it means the change in the scale factor is 5 to 9.
Therefore the correct option is 3.
2.
Total possible outcomes for flipping four coins are
S = {HHHH, HHHT, HHTH, HHTT, HTHH, HTHT, HTTH, HTTT, THHH, THHT, THTH, THTT, TTHH, TTHT, TTTH, TTTT}

Possibilities of getting the same number of heads and tails.
A = {HHTT, HTHT, HTTH, THHT, THTH, TTHH} = 6

The probability of getting the same number of heads and tails is


Therefore the correct option is 3.
3.
The given expression is



Therefore the correct option is 3.
4.
The given expression is

Step 1: (–10.2)(–16.4) = (–16.4)(–10.2)
Step 2: = (–16.4)(–10) + (–16.4)(–0.2)
Step 3: = 164 + 3.28
Step 4: = 167.28
Therefore the correct option is 4.