Agroup of students is investigating how the addition of salt impacts the floatation of an egg in water. four identical cups were taken for the experiment. the data of the experiment are shown. experimental record cup amount of water (ml) amount of salt (g) level of egg above water 1 450 0 sinks to bottom 2 450 68 2 cm 3 450 136 3 cm 4 450 272 4 cm which cup acts as a control group? 1 2 3 4

Cup 1 acts as a control group.

Step-by-step explanation:

Control group: The group used in the experiment by the researchers in which no change in the variable is done. It is then set as a benchmark for the groups which are being tested.

We are given 4 groups which are being experimented for the flotation of an egg in water.

Since in Cup 1, there is no addition of salt

So, there is no change in the variables.

So, by definition of control group .

So, cup 1 acts as a control group since there is no change in the variable .

Hence, the correct answer is Option 1.

Cup 1 acts as a control group.

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5