Well these are definitely going to confuse you unless you know the differences clearly.

‘bieten’ generally means to offer something,

‘bitten’ means to request for something, and

‘beten' means to pray.

Present-----------------------past------------------Past participle

bieten------------------------bot------------------------geboten
(to offer sth.,---------------offered-------------------- offered)

bitten-------------------------bat----------------------- gebeten
(to request for sth., ------ requested-------------- requested)

beten------------------------betete-------------------- gebetet
(to pray---------------------prayed--------------------- prayed)

Examples (bieten):

Was wir unseren Mitarbeitern bieten! - What we offer our employees!

Was wir Ihnen bieten? - What we can offer you?

Ich kann dir nicht viel bieten, aber ich kann dich lieben - I can not offer you much, but I can love you.

Unser Tagungsraum bietet Platz für bis zu 100 Personen - Our meeting room can accommodate up to 100 people.

bis zu – up to

Examples (bitten):

Können Sie mir bitte helfen? – Can you help me please?

Er hat mich um Hilfe gebeten - He asked me for help/ He requested me for help.

Examples (beten):

zu Gott beten – pray to God

Die meisten Muslime beten fünfmal pro Tag - Most Muslims pray five times a day.