I’m meant to find the value of angle x and y. Please show working:)

Evaluate the integral. (sec2(t) i t(t2 1)8 j t7 ln(t) k) dt

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

What is 140% of 25? because i need