A scientist is calculating the pH levels of vinegar and dish detergent. He uses the formula pH = –log[H+]. [H+ v] for vinegar is 6.3 × 10–3. [H+d] for dish detergent is
10–12. What is the difference of the pH levels for vinegar and dish detergent?

Christine went shopping and bought each of her six six nephews a? gift, either a video costing? $14.95 or a cd costing? $16.88. she spent ? $ 97.42 97.42 on the gifts. how many videos and how many cds did she? buy?

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

How are sas and sss used to show that two triangles are congruent?