Form 8B were investigating how a metal bar expands while being heated. The bar was originally 30 cm in length and it expanded to 31.75 cm.

Calculate the percentage increase in length. Give your answer correct to 1 decimal

place.

What is the area of triangle abc if a = 8, b = 11, and c = 15?

Prove that quadrilateral is a rhombus.

Megan is making bracelets to sell to earn money for the local animal shelter. it takes her 1/4 hour to pick out all the beads and 1/10 hour to string them.this week, she only has 5 1/4 hours to make bracelets. how many bracelets will megan be able to make?