Two groups of seventh graders were tested to compare thwir speed solving integer problems. one group had calculators, the others didn't. which is the dependent variable, independent variable and the control variable.

the control variable is the group that isn't using calculators as we're comparing the calculator group with the other. the dependent variable is the speed or time they take to do the integer problems as their time changes when using a calculator or not. the independent variable is whether they have calculators or not as it's a variation but it doesn't depend on any other variable.

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.