Can someone ? it's very urgent. the question is attached

One astronomical unit (1 au) is about 1.496 alt tag missing. kilometers. if you wrote this number of kilometers in regular decimal notation (for example, 528 and 3,459 are written in regular decimal notation), how many zeros would your number have?

Find the value of the variable and the length of each chord for #5 and #6.

Use the squared identities to simplify sin^2x cos^2x