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angel234wilcox
16.09.2019 •
Mathematics
In planning her retirement, liza deposits some money at 2% interest, twice as much deposited at 2.5%. what is the amount deposited at each rate if the total annual interest income is $1190?
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Ответ:
"a" earning 2% interest
"b" earning 2.5% interest
the 2.5% one, is twice as much as the 2% one
so.. one can say that, whatever "a" is, "b" is twice as much,
or b = 2*a -> b = 2a
now.. .the sum of both earned interest, was $1190
so.. one can say that (2% of a) + (2.5% of b) = 1190
let' us use the decimal notation then
solve for "a" to find what the "a" amount is,
to find "b", well, "b" is "2a", so just do a 2*a to get "b"
Ответ:
first blank is velocity or speed
second one is idk