exam Maths Puzzle Numerical Ability

Can I please get some help?

One card is selected at random from a standard 52-card deck of playing cards. Find the probability that the card selected is a red king. (Give solution as a fraction in lowest terms.)

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how do i simplify the following; 2x^6 -6x^4 +4x^3 / 2x^5 A bullet if fired horizontally at a target, and the sound of its impact is heard 1.5 seconds later. If the speed of the bullet is 3300ft/sec and the speed of sound is 1100ft/sec, how far away is the target?