- (20x6) - (12 divided 4)?

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1). What is the energy of a 480 nm blue photon?
2). What is the energy of A 280 nm ultra-violet photon? Help please!!? Is there any real proof x isnt dead? Given that m and n are digits, what is the sum of the values of m and n such that the five-digit number m6,79n is divisible by 72?Show work.? The regression line eq. yhat=2.3x+5, n=10, value of y- value for this is 10.1, alpha=.05 a.) r=.251, what is y value x=5?
b. r=.972 y- x=5? Will a military kevlar vest stop a small caliber bullet at close range?