Out of 100 students of a class, 30%use smart mobile phones. How many students use the sm art phones?

Write a numerical expression that satisfies all of the following conditions. 1.)the only number used in the expression is 5 2.)at least one exponent other than 1 is used 3.)when the expression is evaluated, the answer is greater than 40 and less than 50

Hello i need some with trigonometric substitutions. [tex]\int\limits^a_b {x} \, dx[/tex]

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.