Roberta has $10,540 to invest. she plans to invest her money in certificates of deposit (cds) that have 2.1% interest, a stock portfolio that makes 2.5% interest, and a savings account that has 1.5% interest. she would like to make $231.69 in annual interest from her investments. also, to provide some risk security, she wants to invest a third of the amount she puts in the stock portfolio in the savings account. let x be the amount invested in cds, y be the amount invested in the stock portfolio, and z be the amount invested in the savings account. what is the amount roberta invests in each type of investment?

7

step-by-step explanation:

i'm assuming you need to figure out how many campers go into each tent.

i got the answer by:

24+4=28

28/4=7  

answer: 5

step-by-step explanation:

1 + (6 / x - 1)

step-by-step explanation:

divide using polynomial division.

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: