Answer:
4.5
Step-by-step explanation:
15% of 30 is 4.5
Answer:
C
Step-by-step explanation:
Got it right on ed 2021
Answer:
<h3>Option c)

is correct</h3><h3>
The alternate hypothesis for the significance test is 
</h3>
Step-by-step explanation:
The alternate hypothesis use the sumbol for the population value
Let p be the proportion , Mean be
and stadard deviation be 
The null hypothesis states that population value is equal to the value mentioned in the given claim.
(by given).
The alternate hypothesis for the significance test states that the opposite of the null hypothesis(based on the claim )
∴ 
The symbol "<" because we want to test if the maze is completed faster and thus if the time has decreased.
<h3>∴ option c)

is correct.</h3>
Sum means addition
negative 18 means -18
a number can be x
Sum of negative 18 and x should be 11
thus the equation is