The ph level of a solution measures how acidic or basic the solution is. values between 0   and 7   are considered acidic while values between 7   and 14   are considered basic. the ph is calculated by using the equation ph =−log⁡⁡[h3o+] . the notation ­ ­ ­ [h3o­­­+]   represents the concentration of hydronium ions, which is measured in units of moles per liter, m .    what is the ph level of a solution if [h3o+]=3.4×10−3m ?

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

Can someone me with these two circle theorem questions asap?

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem