The price of bananas went from $0.20 per lb to $0.60 per lb in four years. find the rate of change of the price of bananas

$0.10 per lb per year

Step-by-step explanation:

Given: The  price of bananas went from $0.20 per lb to $0.60 per lb in four years.

The change of price of bananas = per lb

Now, the rate of change of the price of bananas is given by :-

Hence, The rate of change of the price of bananas = $0.10 per lb per year

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."