Cristine's middle school has a total of 900 students and 45 teachers. the local high school has 110 teachers and a student-teacher ratio proportional to the middle school's. how many students will cristine find when she gets to high school? a) 900 b) 1100 c) 2200 d) 2500

900/45 = 20

so ratio of middle school students and teachers: 900:45 = 20:1

if high school student-teacher ratio as middle school then

x/110 = 20/1

so x = 110 * 20 = 2200

answer is C) 2200

12cm

the answer is d

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: