Answer:
It cost 30$
Step-by-step explanation:
Since 50% is 1/2 we put 80/2
so we have 40
25% is 1/4 we put 40/4=10 40-10=30
so the answer is 30
Answer:
100000000
Step-by-step explanation:
(10^4)^2 key =
{(2.5)^4}^2 . = times
(2^4 . 5^4)^2
(2^4) ^2 (5^4)^2
2^4 ^.2. 5^4^.2
2^8 . 5^8
256. 390625
100000000
If you're asking how to simplify, then this is how you do it.
when a power meets another power but in brackets, then you have to multiply the powers. ¼ × 4 would be 1. i simplified 81 to 3⁴.

Explanation:
Area is pi×r^2 and you times it by the fraction of the circle you have as its not a full circle.
Answer:
5
Step-by-step explanation:
Easy