On a 20-item practice test, how many questions must you answer correctly for a score of 80% correct?

16 questions

Step-by-step explanation

Given Total number of questions is 20

To score 80% a number of x questions needed to be answered

Hence x=(80/100)*20

X=0.8*20

X=16 questions

angle q= 92 degree

step-by-step explanation:

the solution is in the picture

when a quadrilateral is inscribed in a circle, the opposite angles are supplement to each other. in other words, the sum of the 2 angle is 180 degree

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: