Answer: Its A
Step-by-step explanation: The square root of 88 is 9.3.... add 2/5 and you get 9.78083151 and its not rational
REFER THE ATTACHMENT ABOVE ☝☝☝☝
<span>f(n) = 0.7(n-1) + 50, f(0) = 235, n>0,
showing 30% sold and 50 added</span>
Answer:
Explanation:
Solving the inequality for x would give you 
, therefore, would be the only option. While you might think 
should also be a solution, it would only be one if 
.
Hope this helps! :)
Answer:
90 degrees
Step-by-step explanation:
general Pythagoras
c² = a² + b² - 2ab×cos(ABC)
with c being the side opposite of the angle ABC.
c = AC
a = AB
b = BC
(0-15)² + (0-0)² = (0-9.6)² + (0-7.2)² + (9.6-15)² + (7.2-0)² - 2×sqrt((0-9.6)²+(0-7.2)²)×sqrt((9.6-15)²+(7.2-0)²)×cos(ABC)
225 = 92.16 + 51.84 + 29.16 + 51.84 - 2×12×9×cos(ABC)
225 = 144 + 81 - 216×cos(ABC)
225 = 225 - 216×cos(ABC)
0 = cos(ABC)
ABC = 90 degrees
