Q1 Water flowed out of a tank at a steady rate. A total of 18 and one-half gallons flowed out of the tank in 4 and one-fourth hours. Which expression determines the quantity of water leaving the tank per hour?

ITS TWO QUESTIONS
Q2

Two swim clubs are having a membership sale. Aqua Plus is offering a two-year membership for $237.36. Water World is offering an 18-month membership for $184.50. Which describes the swim club that has the lower-priced offer?

Step-by-step explanation:

1) 18 1/2 gallons = 18.5 gallons

  4 1/4 hours = 4.25 hours -->

 18.5 gallons/4.25 hours

2) Aqua Plus: $237.36/2 years = $118.68/year

   Water World: $184.50/18 months = $184.50/1.5 years = $123/year

118.68 < 123, 123 - 118.68 = $4.32.

Aqua Plus costs less by $4.32

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: