5. Mr Lim's monthly salary is $2500. Every month, he spends a certain amount and saves the rest of the money. In May, he reduces his spending by 20% and his savings goes up by 80%.
How much does he spend and save each month originally?

x> 6

step-by-step explanation:

8x+8> 7x+14

8x-7x> 14-8

x> 6

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:

4

step-by-step explanation: